Hi, guys (and gals?).
I have a coach lantern-style street fixture on my property that needs a bulb. It currently has a 100w LU100 and it may...MAY...be the wrong size. There's no label in the fixture, and when I tried to open up to look at the ballast I stopped short because the screws are VERY corroded and starting to break off if I go any further. My question is, let's say this fixture IS rated at 100 watts. Will it be ok to install a 70 watt bulb without damaging the ballast?

Thanx