SemiLEDs files for $172.5 million US IPO
A filing with the US Securities and Exchange Commission indicates that SemiLEDs plans a $172.5 million initial public offering of stock.
Hoping to capitalize on the potential of LED-based solid-state lighting (SSL), SemiLEDs will seek to raise capital through an initial public offering (IPO) to both expand manufacturing and lower component costs. The company registered with the United States Securities and Exchange Commission (SEC) to sell $172.5 million in shares.
SemiLEDs hasn’t set a target share price, but the filing indicates that the offering will be underwritten by Bank of America, Merrill Lynch, Barclays Capital, and Jefferies & Co. The stock will be traded on the NASDAQ exchange using the symbol LEDS.
In the filing, the company specifically identifies SSL as its target market. The filing references the projections from Strategies Unlimited (a sister business to LEDs Magazine) that component revenues for SSL will grow from $665 million in 2009 to $4.3 billion in 2014.
SemiLEDs’ filing notes that the upfront cost of SSL will gate the size of the market. One of the company stated strategies is to “reduce cost through technology and manufacturing improvements.” The filing also indicates a plan o expand manufacturing operations.
The company also claims in the filing that among its strengths is a vertical copper alloy chip structure. The technology presumably allows superior heat removal to sapphire-based structures and that thermal advantage translates to superior efficacy – reducing energy cost in SSL.
SemiLEDs both manufactures LED chips for sale and packages a portion of its production capacity for end component sales. The filing cites net revenue for the nine months ended May 31, 2010 as $24,275 million.
Light-Bending Polymer Sticker Boosts Solar Panel Output by 10%
Looking for an instant power boost for your solar panels? Slap on a large, transparent sticker by Genie Lens Technologies to get 10 percent more juice. The polymer film, which can be applied to panels you already have installed, comes riddled with microstructures that bend incoming sunlight for better absorption. More light equals more electricity, which in turn lowers the per-watt cost of solar power.
The inexpensive film works by preventing light from bouncing off the surface of the panel, according to Seth Weiss, the company’s CEO and co-founder. Not only does the sticker trap light inside the semiconductor materials that convert light into electricity, but it also diverts incoming rays so that they travel across — rather than through — the panel, bettering their chances of being absorbed.
Tests at the National Renewable Energy Laboratory showed that the film increases power output by between 4 to 12.5 percent, with the biggest improvement occurring when the sky is overcast and incoming light is diffuse. Although adding the sticker, whether in the factory or on solar panels already installed, raises the overall cost of the panels by 1 to 10 percent, the additional electricity generated makes up for the price.
A more efficient solar panel also means getting by with fewer solar panels, according to Travis Bradford, a solar industry analyst and president of the Prometheus Institute. As a result, other costs such as shipping and installation could also drop. Just one downside: Although the film has been rated for 20 years, it hasn’t been tested for durability — scratches, discoloring, and trapped dust can actually lower power output over time.
Philips Lumileds Luxeon Rebel ES delivers 300+ lumens for outdoor lighting
Posted by LED Larry in Uncategorized on August 9th, 2010
A new addition to the Luxeon Rebel family, the new ES model outputs more than 300 lumens at 1A of drive current boosting efficacy for outdoor SSL.
Philips Lumileds has added to its Luxeon Rebel family with a brighter ES model that delivers in excess of 300 lm, and that the company predicts will shorten the payback period for outdoor solid-state lighting (SSL) installations via high efficacy. The Luxeon Rebel ES can deliver 100 lm/W efficacy at the maximum 1A drive current, or luminaire makers can lower the drive current and achieve even greater 125 lm/W efficacy.
Luxeon Rebel ES
Philips is targeting both outdoor applications such as streets, roadways, and tunnels, and industrial high- and low-bay applications with the Luxeon Rebel ES. The LEDs are available with a choice of 4100K and 5650k color correlated temperatures.
Flexibility is a key feature of the Luxeon Rebel ES product because the design allows luminaire makers to optimize products for efficiency or for brightness – or for variable operation based on adaptive controls. “For our customers, system efficiency and costs are significant drivers of LED solution adoption. LUXEON Rebel ES directly addresses these factors and supports our customers’ key objectives,” said Executive Vice President of Sales and Marketing Steve Barlow.
A luminaire optimized for brightness would likely drive the LEDs at the full 1A current, and luminaire makers would need fewer emitters in a fixture to meet the light-output target. Such a design would lower the up-front cost of the luminaire for the buyer thereby reducing the payback period.
The Rebel ES can still deliver in excess of 220 lm at 700mA drive current and in excess of 125 lm at 350 mA drive current. A luminaire maker could optimize for efficacy by using a lower drive current thereby lowering operating cost due to energy consumption – again potentially reducing payback period.
A scenario with adaptive controls might provide the best of both worlds. Indeed recent research and advice from experts recommend controls to dim and extinguish lights automatically based on scenarios such as time of day and activity (see links at right). LEDs are unique among energy-efficient light sources in their broad compatibility with control scenarios.
Acuity acquires Renaissance Lighting and intellectual property
Acuity Brands extends its prior investment in Renaissance acquiring the remaining shares and makes a separate acquisition of intellectual property.
Acuity Brands expanded its minority stake in Renaissance Lighting acquiring the remaining outstanding capital stock for an undisclosed cash payment. The deal gives Acuity outright ownership of Renaissance’s luminaire line and extensive intellectual property portfolio related to LED-based optical technology. Acuity also announced a separate intellectual property acquisition including patents that had been exclusively licensed to Renaissance.
Acuity had previously invested $9.1 million in Renaissance and received a license to certain intellectual property including the Constructive Occlusion optical system that is used in the Gotham (an Acuity Brand) Ecos downlight luminaire family. Now Acuity will have full access to Renaissance’s LED-based solid-state lighting (SSL) portfolio.
“The acquisition of Renaissance and the purchase of related intellectual property support the Company’s strategy to deliver superior, technologically-advanced lighting solutions,” said Vernon J. Nagel, Chairman, President, and Chief Executive Officer of Acuity Brands. “This acquisition will extend our innovation capabilities in solid-state lighting and controls, enabling Acuity Brands to continue to deliver leading-edge lighting solutions to the market.”
Acuity did not reveal the name of the company from which it acquired the intellectual property that had been previously licensed to Renaissance. It did say that the acquisition would add to its capabilities in the sensor and adaptive controls area.
The announcement of the acquisition didn’t specify how Renaissance would be integrated into Accuity Brands, but it will likely join the roster of individual brands that live under the Acuity Brands Lighting banner. Presently, that roster includes Lithonia Lighting, Peerless, American Electric Lighting, Gotham, Roam and several more.
“The merger into Acuity Brands is a tremendous opportunity to broaden the impact of Renaissance’s technology as it is showcased in Acuity Brands’ expansive lighting and controls portfolio,” said Barry Weinbaum, Chief Executive Officer of Renaissance Lighting. “Since its inception in 2005, Renaissance has amassed a high-caliber team with exceptional vision about the future of lighting and has developed a patent portfolio to foster the realization of that vision.”
LED lamps need to comply with the WEEE Regulations
LEDs are now in scope for WEEE Regulations, which are UK-specific requirements for electrical and electronic equipment to be recycled when it reaches end-of-life.
You may already be aware of the WEEE Regulations which require electrical and electronic equipment to be recycled when it reaches end-of-life. As well as toasters and hairdryers, small WEEE includes compact fluorescent lamps (or low-energy light bulbs), but did you know that since May last year, LEDs have also been classed by the Environment Agency as “in scope” for the WEEE Regulations?
The WEEE Regulations initially came into effect in 2007 to meet the requirements of the EU Directive of the same name, obliging manufacturers and producers to take responsibility for the safe disposal or recycling of their products when they reach end-of-life. Most manufacturers do so by registering with one of the many Environment Agency approved compliance schemes which manage the process on their behalf.
The lighting industry established its own scheme, Recolight, to manage the recycling of all in-scope Gas Discharge Lamps which includes fluorescent tubes, metal halide and sodium SON and SOX lamps. Founded by GE, Osram, Philips Lighting and Havells Sylvania, Recolight now has over 60 members representing the overwhelming majority of all Gas Discharge Lamps put on the market, and a network of over 900 collection points for the collection of business waste. Through Recolight, the lighting industry has funded the recycling of more items of WEEE than any other industry, demonstrating its commitment to meeting the requirements of the Regulations and keeping this potentially hazardous waste stream out of landfill.
The WEEE Directive is currently undergoing a review and LEDs will be specifically named in the scope of the recast Directive which is due to be finalised in 2010/11. In the meantime the Environment Agency has already classed LEDs as in-scope for the WEEE Regulations so companies importing or producing LED and OLED lamps need to comply with the WEEE Regulations now.
Under the WEEE Regulations a producer, importer or anyone who puts new lamps on the UK market for the first time must take responsibility for their products when they reach end-of-life. This includes companies importing from other EU member states, or those who simply re-brand a product.
Compliance schemes like Recolight will ensure their members are compliant with the law and manage the collection and recycling process, which in the lighting industry can be many years after the original sale of the product.
For many UK companies who only import a small quantity of LEDs, complying with the WEEE Regulations may seem like an unnecessary burden. However, good compliance schemes can work with you to ensure this isn’t the case by making compliance as simple as possible.
Complying with the Regulations covers the cost of future recycling and setting up the necessary infrastructure to make recycling as simple as possible. In the lighting industry in particular, where the life of a lamp may be over five years or more and its ownership may change several times during that period, this means that the end-user or contractor will not be left paying to recycle, which in turn should encourage greater recycling rates.
It is essential that all in-scope companies, including LED and OLED importers register with a compliance scheme to avoid the penalties imposed on “free-riders” by the Environment Agency and other enforcement bodies. By ensuring all in-scope companies comply with the WEEE Regulations the lighting industry can continue to lead the way in recycling, and invest in the essential collection infrastructure and awareness raising to keep this hazardous waste out of landfill now and in the future.
Lighting controls offer a reasonable first step toward improving energy efficiency
Evaluation of thirteen of the leading lighting control vendors for commercial offices indicates that solutions can reduce electricity consumption by 35-55%, however payback can range from 2-10 years say David Raezer and Romahlo Wilson.
Lighting comprises 20% of commercial buildings’ overall energy expense and 38% of their electricity expense. Accordingly, effective management of lighting infrastructure is critical to any energy efficiency strategy. In our opinion, the two most impactful, technology-grounded strategies for reducing electricity consumption associated with lighting include:
* Lighting control solutions (see CTA’s Report on “Lighting Controls”); and
* Next generation lighting technologies, such as LEDs (see CTA’s Report on “LED Benchmarking”).
While both are critical to long-term efficiency improvements, Cleantech Approach (CTA) recommends lighting control solutions as a good “first step” toward reducing energy consumption, given that they carry lower technology risk and up-front costs than next-generation lighting technologies. They also enable users to capture immediate energy savings in anticipation of further technological improvements and price declines in next-generation lighting solutions. Furthermore, these solutions should be fully interchangeable with existing bulbs in today’s lighting control systems.
Lighting control solutions enable businesses to reduce electricity consumption costs associated with their lighting infrastructure. With these solutions, businesses can easily control the behavior of their lighting assets (i.e., when lights turn on/off or how/when lights dim) to eliminate wasted light and excess electricity consumption and precisely meet the requirements of employees functioning within a given environment.
We believe that there are two critical elements that potential purchasers of lighting control solutions should consider: the potential payback of these solutions; and each vendor’s unique technological approach. CTA’s recent report offers a high-level framework for understanding and evaluating these considerations.
Understanding the payback on your investment
The first critical factor that should be considered as part of potential investment in a lighting control solution is a thoughtful examination of your building’s/space’s energy use profile. Given the age of and general technology employed in today’s commercial office infrastructure it is highly likely that there are considerable opportunities to reduce your energy use through simple strategies such as daylighting, occupancy control, and scheduling (see descriptions of strategies below). This examination will yield a general cost basis from which payback (the time required to recoup the initial cost of a solution from resulting savings) can be calculated. It should be noted that payback is only a partial return on investment analysis for these solutions as some real estate owners and investors have sought to and successfully capitalized on “greener” assets through higher property values.
Accordingly, CTA used a proprietary approach to examine the cost of lighting control solutions, determine the range of potential cost saving opportunities, and calculate the resulting payback periods associated with the adoption of lighting control technology:
* Cost of the solution: Comprehensive lighting control solutions for commercial spaces, employing the full suite of potential energy consumption reduction strategies, typically cost $1.00-2.50 per square foot installed. Given the regional nature of incentives (i.e., overlapping federal, state, and local tax credits; and lower insurance costs that are sometimes offered to more energy efficient assets) we did not include them as a potential price reduction to solutions.
* Electricity consumption reduction potential: These solutions reduce electricity consumption expenses associated with running lighting networks by 35-55% (in situations where next generation, ultra-high efficiency technologies have not been deployed); our analysis that lays out the assumptions underlying this range of potential reductions is available in the complete report. It should be noted that we assume a constant price per kilowatt hour of $0.12 in our report. At CTA, we aim to provide a general framework that readers can adopt to their unique situations and believe that customers are in the best position to deduce any cost inflation or deflation in their electricity prices, including potentially large increases from clean energy legislation.
* Payback period: Assuming electricity savings only, paybacks on the initial investment in lighting control solutions range generally from 2.7 years (implying 55% electricity savings with a solution that costs $1.00 per sq. ft. installed) to 10.7 years (implying 35% electricity savings with a solution that costs $2.50 per sq. ft. installed).
Lighting controls
This 35-55% electricity savings range was achieved through the use of five strategies employed by best-of-breed lighting control solutions; all of these strategies would need to be used in order to achieve the savings and resulting payback that we lay out in the exhibit above.
* Lumen maintenance: Lumen depreciation is the loss of light output as a fluorescent lamp ages. A lumen maintenance strategy addresses this problem by reducing power in response to higher initial lamp lumens, while increasing power as lamps age and phosphors degrade to maintain appropriate light levels.
* Daylighting: Daylighting allows the lighting control solution to adjust lighting levels according to the availability of natural light during the course of the day: the more natural light enters the office space, the less the lighting infrastructure needs to deliver.
* Task Tuning: Task tuning allows the solution to control lighting according to specific task and working environments, optimizing light output where it is needed.
* Occupancy Control: With this strategy, lights are turned off when the solution detects (with occupancy sensors) that there are no longer occupants in a particular room or area. As building occupants move from location to location, the solution dynamically responds to user-traffic patterns, providing light only when and where it is needed.
* Scheduling: A time scheduling strategy enables lights to be turned on/off at appropriate, predetermined times and locations during workdays, evenings, and weekends.
Understanding each vendor’s unique approach
In addition to understanding the overall value proposition of these vendors, we believe it is important to appreciate how each vendor approaches providing a solution from a technology standpoint. Why is this important? Certain solutions are optimized for certain environments; you want to be sure that you select a solution that it optimized for yours.
Lighting control solutions vendors range from large multinational companies to relatively new startup players with innovative technology. In our detailed report (which we are making available to LED Magazine readers), we have included detailed profiles of key lighting control solutions vendors and their respective offerings. Lighting control solutions vendors (associated brands) profiled include: Acuity Brands (Synergy, SensorSwitch, Lighting Control & Design); Adura Technologies; Cooper Controls; Delmatic; Encelium; EnOcean; Leviton Manufacturing; Lumenergi; Lutron; Philips (Dynalite, Lightolier Controls); Schneider Electric; Universal Lighting Technologies; and WattStopper. It should be noted that CTA does not recommend vendors or endorse a particular strategy for lighting controls.
While all of these vendors employ sophisticated, centralized, software-based approaches to administering their solutions, they often differ greatly on the architectural framework through which they deliver lighting control functionality. At the most basic level, the chief differentiators among these solutions derive their respective communication method and control intelligence dispersal.
Communication Method
What we term the “communication method” – wired or wireless – is a fundamental distinction that can be drawn among these solution providers. When we refer to wired versus wireless, we are referring to the connection between elements in the network (lighting fixtures, sensors, and switches) and an aggregation device; the aggregation device collects the control data and brokers communications between these peripheral devices and the central management console, where the lighting network is monitored and control parameters are set.
* Wired connections require control data to be transmitted over low voltage wiring to an aggregation device.
* Wireless connections can be achieved in two manners: (1) control data sent wirelessly (through the air), usually using ZigBee or EnOcean protocols, to an aggregation device; or (2) control data sent over the existing powerline network, with no low voltage control wiring, to an aggregation device.
Lighting controls
Control Intelligence Dispersal
What we term “control intelligence dispersal” refers to how lighting control intelligence (parameters for how the lighting networks is to operate) is dispersed and where it resides.
* Intelligent, ballast-based strategies. In what we term ballast-based strategies, vendors look to leverage intelligence resident in the lighting ballast itself (a ballast is required to control the starting and operating voltages of electrical gas discharge lights, esp. fluorescents). While all strategies can control ballasts, ballast-based strategies distribute intelligence directly to the ballasts where it resides locally; ballasts then execute the parameters set by the centralized software control console.
* Intelligent, node-based strategies. In what we term node-based strategies, vendors install a controller or node that sits inside each fixture (next to the ballast); it is this intelligent node which is responsible for executing all control functionality according to the parameters set by the centralized software control console.
* Intelligent, sensor-based strategies. In intelligent, sensor-based strategies, vendors distribute lighting control intelligence directly from the central management console to intelligent sensors and switches; there is no aggregating, intermediary, intelligent device.
* Control panel-based strategies. In what we term control panel-based strategies, vendors do not supply an intelligent ballast or node. All of the intelligence is administered through control panels typically resident in electrical wiring closets. These control panels are responsible for communicating with all of the devices on the periphery and executing all of the light level parameters set by the centralized software control console.
A complimentary copy of CTA’s report, “Lighting Controls: Savings, Solutions, Payback and Vendor Profiles” containing detailed payback analysis and vendor profiles, is available to LEDs Magazine readers and can be downloaded from www.cleantechapproach.com/ledsmagazine/.
City of Chicago Testing PolyBrite International’s New Borealis® LED Streetlights
Posted by LED Larry in New LED Technology on August 2nd, 2010
NAPERVILLE, IL. – August 2, 2010 – PolyBrite International, Inc., developer of the Borealis® brand Light Emitting Diode (LED) Lighting Systems, announced today that the City of Chicago has installed new Borealis LED streetlights as part of a test pilot program. The City of Chicago will monitor the LED streetlights, weighed against their current lighting solution for streets and alleyways. The goal is for a safer, cleaner and brighter light that will improve nighttime safety and the overall appearance of the city.
Borealis LED streetlights have been installed and will be monitored for three months on the block of 4800 W. Parker Avenue in Chicago, IL. The city will be testing the LED streetlights for high color rendition to assure adequate vision, and greater control of light dispersion and energy savings. Currently, most of the city’s streets are illuminated with High Pressure Sodium (HPS) streetlights. HPS lights are used primarily because of their long rated life relative to other conventional options, but HPS street lighting has a very low color rendition, hindering visibility at night.
“We continue our efforts in assisting communities and cities everywhere with innovative ways to reduce their lighting concerns and their carbon footprint on the world,” said Carl Scianna, President and CEO of PolyBrite International. Mr. Scianna also noted that, “Borealis LED streetlights have a very high color rendition and consume a remarkable average of 60% less energy than the HPS streetlights. We appreciate the city’s study and their commitment to a clean, bright and safe lighting solution for their city streets.”
Borealis LED streetlights have a longer life, up to 50,000 hours, compared to the HPS life span of 20,000 hours. In addition to reduced maintenance, Borealis LED streetlights have a very high color rendition and produce a sharp, pure color without glare. They feature an instant “on” with no cold starting compared to HPS street lights, which typically take several minutes to achieve full brightness. PolyBrite’s patented LED technology, used in all Borealis lamps and lighting systems, will reduce the city’s operating costs, including lower energy usage and reduced maintenance and bulb replacement.
Motion sensors and lighting controls can also be used with Borealis LED lighting since they can be turned on and off instantly. Furthermore, Borealis LED streetlights are better equipped to withstand extreme hot and cold temperatures and provide more control over what is illuminated, thus reducing light pollution, making it an ideal solution for public lighting applications.
US Lighting Products is a reseller of Borealis LED Light Bulbs. New Products will be added this week to our website for retail purchase!
Ten reasons to buy LED Light bulbs
Light emitting diodes (LEDs) have been turning up all over the place, which leads one to wonder why. What’s so great about these little lights? Why are we seeing more and more LED light bulbs cropping up on everything from cars to traffic lights? US Lighting Products is staying up to date on the latest technology to ensure our customers are saving energy and money.
LED light bulbs have some very clear advantages over other types of lighting, such as:
1. LED light bulbs last longer. Without a filament to break or burn out, LED light bulbs can last for over 100,000 hours without showing their age (that’s over eleven years at full brightness). This lifespan is twice that of typical fluorescent bulbs and twenty times longer than incandescent light bulbs.
2. They are energy efficient. An incandescent light bulb loses 80 percent of its energy to heat, leaving only the last 20 percent for light. LED light bulbs turn this around, giving up a scant 20 percent of their energy to heat loss. Not only that, but they operate at 10 to 20 percent of the power required for incandescent bulbs of similar brightness.
3. LEDs are more colorful. LED light bulbs can be made in a vast array of colors without the use of extra filters, which brings down production costs. They also provide a truer, brighter color than a filtered bulb.
4. LED light bulbs work in silence. The days of humming bulbs came to an end with the creation of LEDs, so there’s no need to lose sanity listening to the thrum, tick, or ping of other light bulbs.
5. They are incredibly safe. With so little energy lost to heat and so little energy used overall, LED light bulbs run cool, which means no burnt fingers or burnt down houses. They are extremely durable thanks to their solid-state construction, so there’s no broken glass to deal with, either.
6. LED light bulbs are focused. LEDs can be made to focus without the use of extra reflectors or lenses, which means less bulk and lower cost for the same beam of light.
7. They are the best for dimming. Incandescent bulbs turn yellow when dimmed, while LED light bulbs retain their true colors.
8. LEDs are versatile. Thanks to the wide array of colors and shapes LEDs be made to replace most any light bulb. Their diminutive size and power-sipping nature also open up a world of possibility, from infrared remote control lights to ultra-light headlamps.
9. LED light bulbs bring light quickly. Lighting up to their full brightness in microseconds, LEDs are a safer choice when reaction time is a factor, like when that car in the fast lane slams on the brakes.
10. They promise a brighter future. LED light bulbs don’t contain mercury, like compact fluorescent bulbs do. Combining that with the fact that they outlast their energy efficient cousins, makes the choice to go LED clear as day.
LED light bulbs have a staggering number of uses, and somehow they keep excelling at all of them. When it’s time to shed light on the subject, this jack-of-all-trades masters all.
Sources
eBay, Advantages of LED Lighting
LEDWorks, Basic LED Information–Advantages and Applications
DOE plans consumer-education initiative on energy-saving lighting
The DOE will work with leaders in the retail and manufacturing segments to educate consumers on green lighting options including LED-based SSL.
The US Department of Energy (DOE) used its SSL Market Introduction Workshop in Philadelphia as a venue to preview a new consumer-education campaign to promote green lighting options. The DOE will partner with GE, Philips, Cree, Osram Sylvania, Home Depot, Costco Wholesale, and Grainger to promote LED-based solid-state lighting (SSL) and other energy-saving lighting options.
The DOE is planning the initiative to coincide with upcoming changes in light-bulb regulation. The Energy Independence and Security Act of 2007 will begin to phase out incandescent bulbs in 2012 – beginning with the 100W lamp and then continuing with lower wattage bulbs on a progressive basis over a two-year period.
According to the DOE press release, “The ultimate effect of phasing out inefficient light sources will be significant national energy savings and a shrunken carbon footprint. However, without an effective consumer education process, these new performance levels could cause considerable confusion.”
The point that the DOE is making is that consumers will need to understand a new figure of merit in place of wattage as an indicator of light output. Indeed wattage has never been a direct measure of light output and new products such as SSL replacement lamps will user a fraction of the wattage or power used by incandescent lamps.
The DOE plans to work with the lighting industry to educate the public on lumens as a measure of light output. The new campaign will also seek to define other benefits of new lighting technologies including for instance the long life promised by SSL.
Expect more details on the education campaign in the coming months. The DOE will formally launch the initiative this fall. It expects other partners to join what’s an impressive group of brand names from both the retail market and the component and lighting manufacturing segment.
New Product : Led Indoor and Outdoor Programmable Lanterns
Posted by LED Larry in Uncategorized on July 13th, 2010
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US Lighting Products now carries a full line of LED programmable lanterns. Choose from indoor or outdoor with a variety of color options. These lanterns are great for restaurants, business, or home holiday decoration. Be as creative as you want with your message! Low energy usage, and easy to program and hang.
Lamp and Decorative LED lanterns for home or business use. Decorative LED Lanterns for indoor and outdoor use. They are water-proof, dust-proof and anti-dampness features incorporated. Furthermore, this product possess characteristics of energy saving, environmental protection, easy installation, easy of maintenance and brilliant color.