Ok, here is my problem. I have 3 florescent lights in my garage. Each has 2 8' bulbs. 2 of them had a burnt out bulb so I just installed all 6 new bulbs. Now the issue. 2 of the 3 fixtures will only light 1 bulb. What would you suggest I check first, secord or third? I have a meter if needed and I did industrial maintenance troubleshooting for 30yrs in a factory. I did not work on flourescent fixtures though. Just noting this work history to let you know that I have some experience. Probably just enough to get myself in trouble. :) Thanks for any help.

120v household line. Feed line suddenly lost power. Tenant reports no heavy usage at the time - says she just finished a shower so possible condensation/steam issue caused the short. one gfci in bathroom works fine, no load on gfci just a direct 12-3 yellow feed line into gfci no load out (appears only bathroom is on bathroom circuit breaker). Double switch box is the problem - first switch controls bathroom fan and shower light. Second switch controls vanity light. Seems main power feed from the "wall" is dead (tested with volt meter and main feed line to switch box is dead). No other outlets or switches seem to be on bathroom breaker (all other outlets & switches in apartment work) I have a few options to get power to the switch box - but my question is how best to track the short in the line? AFAIKnow, since gfci works, energizing from the breaker side will tell me know more than i know now. Is cutting sheetrock the only sure way to track the short location? I would try looking for lower resistance but only the gfci and the double switch seem to be on the circuit. Any suggestions i appreciate - thank for taking time to read my post