Translation guide
Refers to lights inside a vehicle, room, or enclosed space. The most common Japanese equivalent depends on the context: vehicle interior lights are usually 室内灯 (shitsunaitō), while room lighting is 室内照明 (shitsunai shōmei) or simply 照明 (shōmei).
car interior light
The light inside a car, bus, train, or other vehicle, often on the ceiling.
Standard term for interior light in vehicles. Literally 'room interior lamp'.
The car's interior light won't turn on.
I forgot to turn off the interior light.
Common term for the dome light or interior light in a car. Often used in automotive contexts.
Literally 'inside-car light'. Used in technical or formal contexts, but less common than 室内灯.
Lighting inside a room, such as ceiling lights, lamps, or general illumination.
General term for indoor lighting. Covers all types of light fixtures inside a room.
I made the room lighting brighter.
The interior lighting in this room is a warm color.
General word for lighting or illumination. Can be used for both indoor and outdoor, but context usually makes it clear.
Literally 'room's light'. Casual and natural way to refer to the light in a room.
The room light is dim, isn't it?
Lighting inside a building, hallway, closet, or other non-vehicle enclosed area.
Both refer to a car's interior light. 室内灯 is the standard term, while ルームランプ is a loanword from English 'room lamp' and is very common in casual conversation and car accessory shops.
The direct loanword インテリアライト is not commonly used for vehicle or room lighting. It might be understood as decorative accent lighting, but it's not the natural choice.
I replaced the dome light with an LED.
車内灯のスイッチはどこですか？
Where is the switch for the interior light?
照明を消してください。
Please turn off the light.
The indoor lighting is suitable for the competition.