Posts Tagged ‘LED’

Light Emitting Diodes (LEDs) contain solidstate technology made in Silicon Valley using similar technologies that are used in the latest microprocessors. These solidstate devices have no moving parts, no fragile glass environments, no mercury, no toxic gasses, and no fila ment. There is nothing to break, rupture, shatter, leak, or contaminate.
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Do you know what is highest efficacy in LED industry?

CREE has reported its industry-best R&D results of 161 lm per watt for a white high power LED.

CREE confirmed that the 1 mm by 1 mm LED produced 173 lumens of light output and achieved 161 lumens per watt efficacy at a color temperature of 4,689 K. The tests were conducted under standard LED test conditions at a drive current of 350 mA, at room temperature.

Therefore, luminous efficiency is 12-15 times than incandescent bulbs. We believe LED lighting period are coming.

Today I read white paper from Philips about performance of street lights. The light sources are LED, High Pressure Sodium and Mercury Vapor. The datasheet is as follow:

I am not sure when they test these. It may be Auguest, 2008. From the above data, we can find the following results. (more…)

Grow lights are an electric lamp which designed to promote plant growth. They emit an electromagnetic spectrum appropriate for photosynthesis. Sorted by light sources, we can find Incandescent, Fluorescent, Metal-Halide (MH) HID, High-pressure sodium lamps and LED grow lights in the market.
Because of LED technology progress recently, LED grow lights are attractive to indoor and outdoor growers since they do not consume as much power, do not require ballasts and produce a fraction of the heat of HID lamps.
If you are looking for grow lights, you may take LED grow lights into consideration because of the following features. (more…)

Revenue Down Time

For some companies, it’s not only about the cost of changing lamps. What happens when revenue-generating machinery has to be shut down in order to replace the lamps above them? A large carpet manufacturer states that to change a lamp over one of their looms, they have to shut down the revenue-generating loom. When the electrical maintenance crew is doing that, they are not fixing broken looms, so lighting maintenance is not only a cost impact, but it reduces capacity utilization and revenue. In addition to the convention center and heavy manufacturing examples discussed above, there are several other commercial and industrial segments that face potentially high lighting maintenance costs.

Offshore drilling platforms (more…)

High brightness white LEDs are commonly specified to last 50,000 to 60,000 hours at maximum operating conditions. When operated below these maximum conditions, they can last well in excess of 70,000 hours. Well designed fixtures that minimize the lifetime limitations of other system components can take advantage of LED longevity to deliver terrific reliability.

In order to understand the value that this lifetime delivers to lighting users, first one must understand lifetime as defined by LEDs versus traditional light fixtures. LED fixture manufacturers define fixture end of life as a 30 percent reduction in output. This is contrasted with traditional lighting like fluorescent, which typically suffers complete lamp failure. Because fluorescent lamp lifetime is defined as an MTBF, half of the lamps are dead and require replacement by the lifetime rating.

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