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The modern "bulb" in a 150-year-old lighthouse.
(files.catbox.moe)
Technical details: https://www.sealite.com/lighthouse-led-lights/
The part that emmits the light doesn't produce heat radiation like a incondecent bulb, but the circuits driving them do.
That's not exactly true. The LED itself also emits heat. In most cases, this is more than the driver.