NOTE: This definition was changed in RP-16-17 Addendum 4. Deletions have a strike-through. New text is bold.

An enclosure containing the ballast, starter, lamp holders, and wiring for a fluorescent lamp.  Can also be a similar enclosure on which filament lamps (usually tubular) are mounted.

An electrical enclosure within in a luminaire that may contain ballasts or LED drivers, starters, and wiring, depending on the source type.

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