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by mlyle 952 days ago
> I think the filament itself has a bit of a filtering effect (it takes time to heat and cool),

I believe the time constant for most small lamps is 30ms and longer for bigger lamps. 1 / (2 * pi * 30ms) is 5Hz, so 120 Hz will be about 30 dB down. This is probably just barely big enough to matter.
1 comments
Filligree 952 days ago
These ones, apparently, take fifteen minutes.

I wonder what the filament looks like.

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mlyle 951 days ago
Lights that take a long time to warm up are more about establishing an arc or gas temperature for full operation. They still respond to power fluctuations more quickly than the time it takes them to warm up.

E.g. I have both fluorescent and HID lamps with this characteristic; they take a couple minutes to reach full brightness, but still will dim when a big load kicks on and turn off immediately when I flip the switch.

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