Facts About Lighting
What you need to know when selecting a light source ?
Watts and Lumens
Watts is the units for power, is used as a measurement to understand how much power a device will consume. The effectiveness of the conversion of power into the required task is important as low efficiency devices will have power losses in one form (eg heat) or another. Lumen is the units used to measure the intensity of light a 
device will emit at the source after the conversion of electricity into light. Lux is a derived unit based on lumen, and lumen is a derived unit based on candela. The difference between the lux and the lumen is that the lux takes into account the area over which the luminous flux is spread. Lux can be controlled by either increasing or decreasing the angle of the reflector. LED lights actually emit more lumens per watt used than standard halogens and filament lamps. Thus making them much more efficient, simply, they will cost a lot less money to operate than your existing lights.
device will emit at the source after the conversion of electricity into light. Lux is a derived unit based on lumen, and lumen is a derived unit based on candela. The difference between the lux and the lumen is that the lux takes into account the area over which the luminous flux is spread. Lux can be controlled by either increasing or decreasing the angle of the reflector. LED lights actually emit more lumens per watt used than standard halogens and filament lamps. Thus making them much more efficient, simply, they will cost a lot less money to operate than your existing lights.Why does the wattage rating matter to me?
The higher the wattage rating the more power a device will consume. This will translate into the amount of energy used and money spent in your utility bill. LED lights use a lot less power/electricity to work them than halogen or filament lamps. Eco-light LED lighting typically have a Wattage rating between 1 and 5 watts and typically emit lumens.
Example: 2.5 Watt LED device may provide a similar lighting experience to a 25 Watt Halogen light
Example: 2.5 Watt LED device may provide a similar lighting experience to a 25 Watt Halogen light
What is Color Temperature and what are available?
The term used for selection of color in lighting is known as Color Temperature.
The unit used for Color Temperature is Kelvin. For the range of white color itself, the
common term used is cool white (CW – above 5000 K ) or warm white (WW – between 2700 to 3000 K. Cool-colored light is considered better for visual tasks while warm-colored light is preferred for living spaces because it is considered more flattering to skin tones and clothing. Color temperatures in the 2700–3600 K range are recommended for most general indoor and task lighting.
The unit used for Color Temperature is Kelvin. For the range of white color itself, the
common term used is cool white (CW – above 5000 K ) or warm white (WW – between 2700 to 3000 K. Cool-colored light is considered better for visual tasks while warm-colored light is preferred for living spaces because it is considered more flattering to skin tones and clothing. Color temperatures in the 2700–3600 K range are recommended for most general indoor and task lighting.
