Scientific American: Does Turning Fluorescent Lights Off Use More Energy Than Leaving Them On?: "Does Turning Fluorescent Lights Off Use More Energy Than Leaving Them On?
Incandescent lightbulbs are lumbering toward extinction. Now, how best to use their energy-efficient replacements?"
Well, here is the answer. Turn them off all the time for pure energy savings and after 5 minutes if you want to extend the life of the bulb a bit.
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