![]() I theorized that the meters used moving parts and could not practically respond to an event of such short duration. I couldn't get a good idea of its magnitude. I also applied an oscilloscope to the line side of the ballast and I could see a power spike that lasted less than 1/120 second. I don't know what the result would be with a modern fixture. This was so long ago that there was only one kind of ballast available, what we now call a dumb ballast. I could only guess that the ballast limited the filament current just as it limited the ion arc current. I was surprised to find that even after 96 hours I detected no measurable difference. I expected that the power consumption of the filaments during preheat would be different from the power consumption of the ionized arc. I used both recording watt-meters and standard household electric meters to measure the power consumed. I built an apparatus to power-cycle a T12 fluorescent lamp every 60 seconds and an identical lamp every 12 hours. I once performed a direct study on this subject. 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?Īll in all, I say they are pretty happily married, if this is their biggest argument! :-) 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. ![]() 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). He argues that she winds up using more energy because of all those incandescent bulbs, and the heat they create. 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.īut she argues he winds up using more energy because of the initial draw on the fluorescent 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. 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. They have 2 light fixtures in their bathroom. ![]()
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