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Christmas mini lights (filament/incandescent, not LED) - question about voltages

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IanB:

--- Quote from: Sredni on October 31, 2023, 09:10:42 pm ---The ones I have always used for my light fixtures had a minimum power requirement of a out 100W. Iirc they buzzed when used at lower powers, or maybe they just didn't start. I never bothered to search for a more adequate product.

--- End quote ---

That's odd. I have never encountered one with such a high minimum power requirement.

Zero999:

--- Quote from: IanB on October 31, 2023, 09:14:41 pm ---
--- Quote from: Sredni on October 31, 2023, 09:10:42 pm ---The ones I have always used for my light fixtures had a minimum power requirement of a out 100W. Iirc they buzzed when used at lower powers, or maybe they just didn't start. I never bothered to search for a more adequate product.

--- End quote ---

That's odd. I have never encountered one with such a high minimum power requirement.

--- End quote ---
I would expect the minimum power requirement would be higher on 230V, than 120V, since the power is double, given the same current. I don't recall a dimmer with a minimum load of 100W though. 40W is most common.

Sredni:
Just checked it: they are rated for loads with power comprised between 100W and 500W.
These were bought more than 15 years ago.
There are newer versions that go from 40W up (to 200W max), and even some with a minimum requirement of 10W.

I need to refresh the theory on how to design these things...

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