What does IRL stand for?

Incandescent Reflector Lamp (lighting)

This definition appears very rarely and is found in the following Acronym Finder categories:

Science, medicine, engineering, etc.
Business, finance, etc.

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Samples in periodicals archive:

The rules do not phase out incandescent lights, but require incandescent reflector lamps (IRLs) used in recessed and track lighting to be 25 percent more efficient by 2012.

DOE tightens lighting standards

It focuses on General Service Fluorescent Lamps (GSFL), commonly found in residential and commercial buildings, and Incandescent Reflector Lamps (IRL), commonly used in recessed and track lighting.

United States: U.S. to set new rules for light bulbs, invest in ...