The cup is reflective on the inside, so that all of the light generated by the bulb get directed by the main reflector, same as in the headlights. They have no cutoff. This makes bulb placement important. This is what makes 'plug and play' HID's and LED's look so bad, as well as illegal.

I upgraded mine with HID's retrofitted with projectors from The Retrofit Source. Toss in switchback halo's and painted the reflector black. Aiming is more like wishful thinking as the bulb is fixed and the housing is mounted to plastic with only up or down adjustment. But for fogs all you really need is them aimed at the ground in front of you and low enough to light the road under the fog.

Last edited on Sat Feb 3rd, 2018 02:44 am by Ordinary Biker