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The modern "bulb" in a 150-year-old lighthouse. (files.catbox.moe)

submitted 4 months ago by Blaze@reddthat.com to c/interestingasfuck@lemm.ee

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Technical details: https://www.sealite.com/lighthouse-led-lights/

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[–] neidu2@feddit.nl 32 points 4 months ago (1 children)

Yes. LEDs on that scale generate a lot of heat. Far less than a normal bulb on the same scale, but the problem is that an LED array is more compact and sensitive, so it retains heat much better, and is more sensitive to it.

Source: I've retrofitted a lot of old ships with more modern LED "bulbs" for their search light.

[–] DarkThoughts@fedia.io 11 points 4 months ago (4 children)

Kinda crazy to think about considering that LEDs are so efficient that they typically do not produce any significant heat at the use cases we're used to.

[–] w2tpmf@lemmy.world 17 points 4 months ago (1 children)

The part that emmits the light doesn't produce heat radiation like a incondecent bulb, but the circuits driving them do.

[–] englislanguage@lemmy.sdf.org 4 points 4 months ago

That's not exactly true. The LED itself also emits heat. In most cases, this is more than the driver.

[–] foofiepie@lemmy.world 4 points 4 months ago

/Flashlights enters the chat.

[–] just2look@lemm.ee 3 points 4 months ago

LED bulbs for vehicles also usually have at least a heat sink. Some of them even have a fan or other active cooling.

[–] IMongoose@lemmy.world 2 points 4 months ago (1 children)

I've only seen it in enthusiast level flashlights lol.

[–] shalafi@lemmy.world 3 points 4 months ago

I have a few that will hurt your hand after a bit, and most have a heat cutoff sensor.