Quote:
Originally Posted by TestDrive
Wow! That's way more than I'd have guessed. How do/did you determine?
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By driving the same scheduled route with or without my lights on under the same temps and wind situation, something that happens regularly when the day length is rapidly changing near the equinoxes. When you are running at the minimal energy budget needed to achieve 70mpg, the power hit needed to run the lights takes a bigger chunk out of that energy budget than it does when you running at an energy splurging 20mpg. On my F150 I can hardly notice a difference between lights on and lights off.