I seem to be on an accessory kick, windshield, saddle bags, usb phone charger, trunk, upgrade the flasher to electronic for future led turn signals, and the current project is an LED H4 Headlight bulb. I wanted to share this for anyone interested in a drop-in solution for an LED headlight replacement/upgrade for the H4 Halogen Honda Headlight.
here is an H4 Halogen bulb.
Note the forward filament with the reflector under it, this gives you the fan-out and down pattern to see the road and not blind other drivers. the High beam is rearward to give the correct flood pattern.
This is the wrong bulb, triangle of LEDs, upper 2 for low beam, add the bottom one for high beam. They are in the wrong position (wrong geometry for the reflector) and give you a spot instead of a fan.
Needless to say I returned it.
then I found this one, with the correct geometry, forward with reflector for low beam, rearward for high beam, and it's whiter and brighter. (its not upside down, I photographed the other side and realized it after I was composing this)
You remove the H4 adapter ring to put that in the headlight and clip it down, then insert and twist-lock the bulb into it, and it fits beautifully into the bucket.
I'm not specifically advertising this particular one, I'm sharing what to look for in the physical geometry of the LED, but if you care this was found on Amazon.