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Autobody, Lighting, & Structural TechThis forum is brought to you by RPM Electronics in Burnaby.
Discussion about modifying your auotomotive lighting, retrofits, auto body, share projects, ideas, etc.
Hi guys, i have questions for the electricity in the car. I know the OE bulb only 55W halogen for the high beam. And I'm planning to install a pair of 100W LED each bulb. Some says it won't be hot as halogen so melting issue won't be there. But the wattage issue is my concern.
Will i be saved by using relay with 30A fuse and 40A wiring rating? Is it true that 100W led bulb is not as hot as the 55w halogen? Will this conversion messed up my car?
Wattage (joules/second) is a measure of energy, not heat. Generally speaking, LEDs are more efficient, so they turn more of the 100 watts into light, and not heat, so they run 'cooler'.
Watt = amp x volt. Since 100 = 8.333 x 12, you'll be drawing 8.3 amps ,less counting internal resistance of the wires.
You probably want a 10A or 15A fuse, and appropriate wire gauge.