### Question
What does lumen output mean?


### Answer
**Lumen output** has the following meaning in *42 U.S.C. § 6291*:

> total luminous flux (power) of a lamp in lumens, as measured in accordance with applicable IES standards as determined by the Secretary

#### Citation:
  - *42 U.S.C. § 6291*
  - Heading: **CHAPTER 76-AGE DISCRIMINATION IN FEDERALLY ASSISTED PROGRAMS > SUBCHAPTER III-IMPROVING ENERGY EFFICIENCY > Part A-Energy Conservation Program for Consumer Products Other Than Automobiles**

