Help me save a friend's marriage! :-)
They have 2 light fixtures in their bathroom. One is incandescent with 6 75W bulbs, and the other is a fluorescent fixture with a 22W bulb that looks like it probably a type T9 bulb.
Whenever she goes into the bathroom, she turns on the incandescent fixture, because she heard that it is expensive to turn on an fluorescent fixture.
In contrast, whenever he goes into the bathroom, he turns on the fluorescent fixture because he knows that 6 75W bulbs uses much more energy than 1 22W bulb.
But she argues he winds up using more energy because of the initial draw on the fluorescent bulb.
He argues that she winds up using more energy because of all those incandescent bulbs, and the heat they create.
I suggested that maybe they replace the incandescent light fixture, but they both said that's not an option right now (they are saving to eventually buy a nice LED one). Then I thought maybe they should replace the fluorescent one, but I questioned whether or not the cost (and waste if they didn't find a new home for the old fixture) would be worth it.
What do others think? How much energy does a fluorescent T9 bulb use on start-up? Should they use the fluorescent fixture for long bathroom visits, but the incandescent for short visits? How do you define long and short? Would it be worth it to replace the fluorescent fixture?
All in all, I say they are pretty happily married, if this is their biggest argument! :-)