Tony Hwang wrote:
Tony wrote:
E Z Peaces wrote:


Rats! It would reduce RMS voltage by 29.3%!

So, by formula, power would be 57% and lumens would be 31%, a 46%
reduction in lighting efficiency.

Did you also figure the filament having a much lower resistance?
Hi,
Resistance goes lowe as it gets hotter. So what do you think?

I think that's true of some materials. As tungsten gets hotter,
resistance increases.

From Don's data on a 100W gas-filled bulb,
it appears that
at 120V the resistance is 144 ohms and the temperature is 2865K.
It appears that
at 132V the resistance is 150 ohms and the temperature is 2975K.