69ShelbyGT350H

A 50w halogen bulb will draw the same amps as a 50w incandescent/tungsten bulb. A 50-watt halogen light draws 3.9 amps per light @12.8v. A 55-Watt Halogen light draws 4.3 amps per light @ 12.8v. There is an equation used to determine amperage when watt rating and input voltage is known. Amperage equals Watt Rating divided by Input Voltage which is typically 12.8 volts in automotive applications. So 55 watts divided by 12.8 volts equals 4.30 amps. Your specific charging system may output slightly more than 12.8 volts which will increase the amps drawn. Incandescent light bulbs fade with age, unlike halogen bulbs. An average incandescent bulb will last anywhere between 750 and 1,000 hours. An average halogen bulb will last anywhere between 2,250 and 3,500 hours. A 75 watt incandescent bulb produces around 1,180 lumens of light while a 75 watt halogen bulb lets off about 1,300 lumens. Sources: https://www.quora.com/Do-halogen-lamps-consume-more-electricity-than-a-regular-light-bulb-lamp https://www.tomsguide.com/us/light-bulb-guide,review-1986.html https://www.etrailer.com/question-7611.html http://www.answers.com/Q/How_much_amperage_do_headlights_draw?#slide=1

If it goes to 30 when set to 0 initial, you should set initial to 6 btdc so it maxes out at 36 total advance.

I hope this is not all about upgrading to LED's as I would like to ask if anyone has any comments about upgrading from the standard factory type incandescent(Tungsten?) lamps to the Scott Drake Halogen lamps? I bought the Scott Drake lamps for two reasons. #1 is the lamps that were on the car are marked as General Electric with the GE logo on the bottom, and the Scott Drake have the Ford Logo cast into the inside center of the lens. #2 I have read somewhere on the WEB that the Halogen lamps were to draw less watts than the incandescent lamps, so the Halogen lamps were to draw less watts to generate the same light. But I now look at the back of the Scott Drake Halogen have stamped on the back 12v 50/55w. So do they produce more light at 50/55w or are they the equivalent of 50/55w? If anyone has tried these Scott Drake lamps, how is the light pattern? My results may differ as I have the 7" version.