[GreenKeys] [External] Tip on loops

[Bruce Gentry]

LEDs will work fine at typical refrigerator temperatures and outdoor in 
sub zero weather. Bulbs for ovens differ in a few details. First, the 
envelope is made of glass that will not soften in oven temperatures or 
crack or shatter when the oven door is opened and cold air rushes in. 
Second, the leads from the filament to the base are spot welded instead 
of soldered so they will remain connected at high temperatures. I do not 
know for certain, but they may be filled with noble gas under different 
pressure from regular bulbs or  vacuum to reduce strains on the 
envelope. Regular bulbs are usually not vacuum, but instead filled with 
argon and/or nitrogen at about 1/2 atmospheric pressure.

        Bruce Gentry, KA2IVY


On 10/7/19 4:59 PM, Dave Horsfall wrote:
> On Sat, 5 Oct 2019, Dave Wade wrote:
>
>>>> .. but in general you are limited to LED bulbs for general purpose 
>>>> use?
>>>
>>> How good would they be in a fridge/freezer or a stove?
>>
>> Those are not "general purpose". Put a normal incandescent bulb in on 
>> oven and it won't last long either.
>
> Funny; my oven has an incandescent, so I guess it's designed for ovens.
>
>> My freezer does not have a light, why shouldn't LED lights work in 
>> Fridges? Pretty sure my new fridge has an LED light...
>
> I heard somewhere that they operate under "normal" temperatures, but I 
> guess they've improved since then.
>
> -- Dave VK2KFU
>
>
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