noun
incandescent lamp; incandescent light bulb
Refers to a traditional light bulb that produces light by heating a filament. Often contrasted with LED and fluorescent lighting.
白熱灯は消費電力が大きい。
Incandescent lamps consume a lot of electricity.
この部屋の照明はまだ白熱灯だ。
The lighting in this room is still incandescent.
LED light bulb, which is even more energy-efficient and longer-lasting than incandescent or fluorescent lamps.
Compound of 白熱 (はくねつ, 'white heat, incandescence') and 灯 (とう, 'lamp, light').