H11 to H9 conversion. DIY with temps
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11-16-2010, 12:03 PM
2009 IMPREZA 2.5i 4d
Being the car wasn't running, you ran the lights with 12 volts. You'll have around 14 volts with car running.
Power = (E x E)/R , that's voltage squared divided by resistance
You'll have 36% more power with the car running.
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