Definitions for "Lumens Per Watt"
Keywords:  efficacy, edison, lpw, watt, halide
The efficiency of a given lamp - the amount of light generated per unit of energy used
The amount of lumens per watt. This tells you how efficient a bulb is.
A measure of the efficiency of a light source, equal to the lumens produced, divided by the power (watts). For example, a 100-watt lamp producing 1750 lumens yields 17.5 lumens per watt.