Ok guys here is the picture of the back of the halo headlights
the reg harness headlight plugs into the H4 bulb
4 extra halo wires are 2 small red and 2 small white
Hook the 2 whites together and ground to screw shown
Hook the 2 red wires together and add some length of red wire and extend down to parking light harness and tap into the red and blue wire on the parking light harness (for a 91 yj colored wires) not sure if it is the same for all yjs wire color. Just find the hot wire for the parking lights make sure it is not the hot wire for the turnsignals, other wise your halo will blink with the turnsignals.
And thats should do it.
I dont think the h4 bulbs are replacable on this unit, they seam to be sealed in, but for 16 dollars for the 2 headlight what do you expect.
The H4 bulbs are 80/85 watt. Dont forget to seal the rim with RTV before installation the day before. Rim meaning where the glass meets the plastic housing. Just to make sure they stay dry. Also had to bend the tabs at the back of the headlight housing just a bit to get them to seat properly. Not much, but a tiny bit. You can see the big tabs upper and lower on the picture