On Sunday, 8 September 2019 02:19:22 UTC+1, Larz wrote:

I picked up a surplus yard light called Electripak SV-175M thinking that
it was 175 watts. It uses a mercury vapor bulb, but the bulb inside
appears to be 125 W. Since I want to use 175 W mercury vapor instead,
is it possible to swap out the medium base for mogul base and use the
175 W mercury vapor bulb? It has an H42 ballast, no capacitor. Thank you.

Would there be much point? Mercury is obsolete for a reason. Total cost of ownership of a LED light is cheaper. And the light's better. And no warm-up issues. Your fitting/bulb might be free, but the electricity isn't.


NT