LEDs do get warm, some larger ones get hot.
LEDs need drivers ( power supply to convert 230 volt AC into a constant DC current for the LEDs ), The drivers can become warm or even hot.
LED's run cool. 12 volt is DC like a battery and works from transformers. 240 volt is AC mains power. Therefore you'll not kill yourself when water or damp gets into your 12v circuit, but with mains you could be dicing with the grim reaper. There are regs on bathroom zones and only 12 volt DC can be fitted in certain areas.
They are using liquid cooling in some aimed at the domestic market.
Parts of an LED lamp can be hot.
Hence "It depends. What sort? How powerful? Touch where?"
But "why does it matter?" seemed reasonable. Who touches lamps? In a bathroom? Why? Where do they touch them?
12 volt is DC like a battery and works from transformers. 240 volt is AC mains power. Therefore you'll not kill yourself when water or damp gets into your 12v circuit, but with mains you could be dicing with the grim reaper. There are regs on bathroom zones and only 12 volt DC can be fitted in certain areas.
We have 240 volt LED downlights, the ones equivalent to GU10 bulbs. They're never on for any serious length of time but generally speaking there's no heat from them. They simply plug into the existing holder with no fancy drivers etc. We got them from ebay about a year ago and have had no problems.
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