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"Doesn't it take more energy to turn an incandescent bulb on and off than to leave it on for a minute? (Or is that a myth?)"
Yup, that's a myth. It's just like the myth, "If I turn the thermostat down in my house, it will take way more heat/money to get it back up to a comfortable temperature once I get home."
On brake lights, you may want to use LEDs just because of the faster response time. I'm making it up from memory, but somebody did the math and, at 45 mph, the faster response time keeps the car behind you 5 feet further back from your bumper. Not a trivial distance.
HTH,
troy
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2004 VW TDI PD on bio
want to build 150 mpg diesel streamliner.
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