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Thursday, 16 October 2014

Basic Guidelines While Purchasing LED light Bulbs – Part 2



Continued………
5. There is a huge market for LEDlight bulb with plenty of products. Many of the LED bulbs are less expensive and might be of low quality. A good quality LED light bulb would cost more than the cheap ones because they use high-quality chips, this clearly shows that although these LED light bulbs are more expensive, but they are far more superior.
6. LED light bulbs cannot be dimmed with traditional dimmer module. LEDs require constant current to operate. Because of this, if a standard dimming method is applied, it will flicker at regular intervals and may not function properly or will stop working. In order to dim an LED light, a 0-10V dimming module is required in order to "trick" the LED into emitting less light. In theory, all LED lights are dimmable with this module.
7. While comparing LED lightbulbs, it is essential to understand and take into consideration the lumen output. The lumen is a standard unit that is used to compare LED light bulbs to standard bulbs, such as incandescent and halogen. Roughly, a lumen is a measure of brightness. Lumen quantity is important, but maybe more important is lumen quality, i.e., luminous efficacy (lumen/Watt). Today's LED quality has a luminous efficacy between 60-70 lumens/watt.
8. Color temperature and beam spread (area covered) are the other major factors to be considered while comparing LED lights. Both color temperature and beam spread are measured in degrees. Color temperature refers to the color of the light emitted. In general, 3000 Kelvin is warm white (closer to infrared light) and 5000 Kelvin is cool white (closer to ultraviolet light). Cool white is brighter because it is the natural color of LED light, whereas chips that emit a warm white light.

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