noun
interior light (car); dome lamp
Wasei-eigo from English 'room lamp'; refers specifically to the interior ceiling light of a vehicle, not a room light in a building.
wasei-eigo (Japanese-coined English), from room lamp
夜に車に乗ったら、ルームランプをつけて荷物を探した。
When I got in the car at night, I turned on the interior light to look for my bag.
The dome lamp has burned out, so I need to replace it.