make sure the bulb is tight,if the glass part of the bulb is loose around the socket replace the bulb ,or change the bulb if that does not fix it replace the socket
1. Is it safe to go 40w over the maximum wattage for a ceiling fan light fixture?
May I suggest you try some of the modern cfl lamps ? We have one in our bedroom and it has coils inside and a spherical bulb outside so it looks like an old style pearl bulb, and it's much brighter than a 60 watt filament bulb, but it's only 15 watts. You do not have to have them rewired, and a handyperson who knows what s/he is doing is permitted by law to replace faulty fittings. A lampholder will be rated for 100 watt incandescent bulb. Another good reason to use cfls though is that a filament bulb gives 80% of the output in heat, so a 60 watt filament bulb gives 45 watts heat, whereas a 15 watt cfl only gives 3 watts heat and is brighter than the 60 watt filament. Yes, some of the old cfls were awful, but do try some of the better new types !.
2. How do you determine if a light fixture is still hot if you aren't sure which breaker to trip?
Be carefull as there is normally a permanent live in every light and it will go from light to light untill it gets to the end one. First of all a continuity tester will not tell you if it's live or not, but a little terminal screwdriver with a neon will, by holding your finger on the metal part on the end of the handle and then touching each red wire in turn it will light up, (do not wrry you wo not get a shock) if it does then it is obviously live. I normally work on lights with the switch off but as I say there might be the permanent live in there so you have to remember which it is and not touch it. It looks like the best way for your situation is, if you know which light is causing the problem then the safest way is to either find out which breaker works the lights because one breaker normally works all the lights or if not completely isolate with the main switch.
3. How can I mount a light fixture onto my bathroom mirror.?
Goop. it's a silicone type of glue, and although i have not used it to mount anything to glass, i can attest that it has strong holding power. i used it to put the rubber trim back on a car bumper and have used the car to push other cars and it wo not come off. of course that leads to the next thing; make sure that you want it. once it sets up, it going to stay there. i've used it to mount a pedestal sink and when the sink was taken out, the ceramic tile was pulled off of the floor. so mark carefully where you want the bracket for your fixture before you place it on the mirror. i would suggest a 1/4" bead of goop around the outer edge and hold it onto the mirror with duct tape until it sets up. then mount the fixture as normal. should you ever need to take the bracket off you will need to do some serious carving with a razor blade. you can find Goop at hardware and home improvement stores. good luck, and i hope this helps!
4. Both Wires on light fixture I'm installing are the same color?
The marked wire is the neutral (white). It DOES matter which way you wire it!!! If it's backward, the fixture will be UNSAFE since the outer ring on the socket will be hot! After installation, test voltage. Do things right
5. My father recently spliced a new light fixture after the old one broke but it keeps flickering after awhile. How can I fix it?
Call an electrician or to check it yourself, turn off the power to that circuit and loosen the fixture to determine if the connections are secure. There most likely is a loose wire in a wire nut or under a screw. Be careful to make sure it is safe to re-energize.