What is efficacy? |
| Efficacy is
a term used to describe the efficiency of
a lighting product. This is measured in
LPW, or lumens per watt. To determine the
efficacy of a lamp, divide the lumen output
of the lamp by the watts consumed. For example,
a 60-watt soft white has 840 lumens and
has an efficacy of 14 LPW. |
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