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What is LUMENS OUTPUT PER WATT?
LUMENS OUTPUT PER WATT refers to LUMENS PER WATT.
Lumens Per Watt is the measure of efficacy of a light source in terms of how much light (lumens) produced in relationship to how much power (watts) consumed.
For example, a 100 watt incandescent bulb emit 1750 lumens so the bulb's lumens output per watt consumed is 17.5.
It's a trade off... the higher the efficacy usually the lower the Color Rendering Index (CRI) rating, or the shorter the life design of the bulb.
references for this page: LUMENS PER WATT, EFFICACY, LPW, LUMENS OUTPUT PER WATT, POWER FACTOR
references to this page: COLOR RENDERING INDEX, ELECTRONIC BALLAST, HALOGEN BULB, HOURS