LEDs bring several advantages to the lighting industry, including high efficiency and durability. And, with superior life over other lamp sources, their required maintenance is greatly reduced. This translates into energy savings, maintenance savings and an overall reduction in cost of ownership.
An LED does not burn out like a standard lamp, so individual diodes do not need to be replaced. Instead, the diodes gradually produce lower output levels over a very long period of time. If one LED fails, it does not produce a complete fixture outage.
White LEDs are made by placing a yellow phosphorus coating over a 470nm blue LED chip giving the white LED a cool white or florescent appearance. White LEDs made from a blue chip should not be used as a general backlighting light source for different coloured lenses and panels.
Based on how long a fixture is illuminated per day, Hours of Operation: 50,000 hours is:-
LEDs have increasingly been used in many different applications to replace old incandescent light bulbs. Examples include LED indicator lights for all kinds of electronic devices such as cell phone, calculators, automotive dash panel, LCD back-lighting, etc., LED seasonal decoration lights for Christmas and holidays, LED traffic signs and other LED direction signs, LED flashing lights, and so on. As currently available LEDs have limited brightness, in most cases, they can not be used to replace incandescent or florescent light bulbs for general lighting purposes.
The most popular LED products available in volume at the market place are various kinds of LED decoration light products. And in fact, they are ideal for replacing conventional incandescent decoration light products, because when compared with incandescent light products, these LED products save up to 95% energy, have much longer working hours, are more rugged, and safer in terms of danger of fire and electric shock.
At present, people can buy beautiful LED light strings, LED rope lights, LED icicle strings, and individual round LED bulbs with changeable colors, LED rope lights, LED pipe lights, and more other LED products will be put into market in the near future.
The reason is that different semiconductor materials are used for different color LEDs, and some semiconductor materials are more expensive than others; another reason is that manufacturing costs are different. White LEDs are the most expensive because red, green and blue LEDs are combined together to make a white LED
LED fixtures must be designed with junction temperature thermal management as a key component and use the correct LEDs. These products will then be robust enough to operate in most ambient temperature applications. Unlike fluorescent sources, cold temperatures do not impact the performance of LEDs.
Many manufacturers imply that their luminaire will optically perform equal or better than the existing HID fixture it is replacing. Ask for an independently tested IES file showing the optical performance in the designed luminaire you requested. A lot of companies are just showing the “bench test performance” and not providing the actual optical performance of the LED system inside the actual fixture! Most units, especially the Retrofit Kits, lose more than 50% of their performance when the photometry is measured with the Retrofit Kit inside the luminaire! A far cry from the output that is claimed outside of the luminaire!
LEDs are commonly used in aesthetic, effect, or specialty lighting applications, including architectural highlighting. Most traffic lights and exit signs, for example, now use red, green or blue LEDs.
Super-bright white LEDs have the advantage of minimal lumen depreciation, better optical efficiency and high lumens per watt. This means these LEDs can be used to replace traditional HID luminaires. LEDs also have a vastly longer life span than traditional lamp sources. The fixture design also must be designed to leverage these inherent advantages of LEDs. A Total Systems Approach is needed for an LED product to bring all these features together.
LED fixtures also have an environmental advantage in that they contain no mercury, last longer and produce less waste, and they are made from fully recyclable materials. Furthermore, the extruded aluminum heat sink is manufactured using 77% post-industrial recycled material.