General > General Technical Chat
I thought LED lights were efficient?
Siwastaja:
Any even remotely decently designed LED bulb works at however low temperature just fine.
Misdesigned crap can fail to work due to any "external" reason. The real reason is failure in engineering, deliberate or not. In other words, there is no actual real engineering reason why LED lights should fail to operate at low temperatures. Fluorescent lamps are different, they really need to maintain high temperature inside the tube, as evidenced by the warm-up times even in room temperatures. LEDs work only better, the lower the temperature. Increasing ESR of electrolytic capacitors at low temperatures is the only "problem" I can think of, but it should not be a show-stopper. Cheap crap often even does not use them (evidenced by flicker).
Some manufacturers take advantage of the reputation of crap products failing at low temperatures, selling "special" low temperature LED bulbs. I would not buy them, and just try to find normal products with decent reputation, and if they fail to work as they should, return to seller and claim for money back.
madires:
--- Quote from: cdev on April 09, 2022, 12:37:10 am ---How do they do in cold weather. When its cold, it seems some LED lamps struggle to stay lit. CFLS are even worse.
--- End quote ---
LEDs in the garage work just fine. Even in the fridge.
BrokenYugo:
--- Quote from: cdev on April 09, 2022, 12:37:10 am ---
--- Quote from: james_s on April 08, 2022, 07:51:33 pm ---If you buy quality bulbs they are pretty reliable. I have lots of LED bulbs that are >10 years old, the one in the porch light by my front door was installed in 2011, runs dusk till dawn and still looks like new. I have a bunch of Philips Hue bulbs too, both white and RGB varieties and I've yet to have one of those fail.
--- End quote ---
How do they do in cold weather. When its cold, it seems some LED lamps struggle to stay lit. CFLS are even worse.
I've never read about this.
--- End quote ---
I would assume cracked solder joints or something to that effect. LEDs can handle a lot more than earthly cold and the driver parts are all good for it, if you go on youtube you can find demonstrations where they dunk a regular non phosphor 5mm LED into a small container of LN2, which is cold enough it screws with the semiconductor physics and changes the color of the output dramatically.
cdev:
Thanks for that pointer. This is very interesting to see and know.
his is an RF-excited lamp..
Look at the related videos for more..
Northy:
The lights were delivered and they are the wrong brand |O
Graham
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