Our expert enlightens a reader on the origins (and new interest) in RLM fixtures.
What does RLM stand for? Everyone knows what they are, how to specify them etc., but no one seems to know what RLM means. Help!
These days it means reflector luminaire manufacturer, but originally it meant reflector light microscopy. It is a fixture that is designed to project light downward, which has gained new interest in communities with Dark Sky ordinances.
Randall Whitehead, IALD
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