LED technology - this is a serious alternative to traditional light sources in various applications.
Light Emitting Diode (LED) generates light in a semi-conductor material, which is an electronic component. Using the right materials, a diode may produce visible light of various wavelengths White light is created by either using a blue diode or “chip” and adding yellow phosphor on top of it or mixing light from one red, green and blue diode (RGB).
LED is not a new invention and most of us are used to LED`s being red or green signal markers on your Hi-Fi or television set. These are so called – low-power LEDs. During the last couple of years “high power” LEDs, i.e. LEDs operating at powers of around 1 W, have reached a level of cost and performance that make them attractive to the general lighting industry.
One of the advantages of LED is that all the light is emitted in one direction. This entails fewer reflections inside the luminaire since we normally want the light to go downwards only.
Another of the benefits of the LED is its long lifetime. Because it has no movable parts or filaments that may break, LED’s can have long lifetimes. Typical lifetime of the LED is 50,000 hours.
The performance of a LED is often measured in terms of lumen per watt or efficacy. Currently, the efficacy levels are at around 150 lm/W, coming out from the light source.
The initial investment for LED lighting equipment may be higher compared to the traditional, but because of the high energy efficiency (consumption 2 times less) and low maintenance costs (replacement lamps produced 2-3 times less) total cost of ownership for LED lamps will be less. Normal payback time for LED lamp is 2.5 - 3 years.