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Incandescent light bulbs are officially banned in the U.S.
(www.digitaljournal.com)
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this post was submitted on 03 Aug 2023
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Specialty bulbs are still produced but even those are shrinking.
I recently bought a very low power/low lumen LED light bulb and it was rated for refrigerator and other low temperature use.
Hoven lamps will eventually suffer the same fate.
LED bulbs for refrigerators and freezers are pretty easy to design since the lower temperatures will let the LEDs run more efficiently. Oven lamps might never get LEDs because normal solder starts to melt around 350F and will soften around 200F so unless they start making the bulbs with exotic and expensive solder we will never see LEDs in the oven.
They don't need to put the light inside the oven. Light pipes are a thing. It's obvious that it would cost less to put the fixture inside the oven, so that's probably why we have to put up with incandescent bulbs inside the oven, instead of a better solution that would probably last the life of the oven.