Review on 🚦 DOT Approved 60W 4x6 Inch LED Headlights - Chrome (4 PCS) Rectangular Replacement Compatible with Peterbilt, Kenworth, Freightliner, Ford, Probe, Oldsmobile, Cutlass - H4651, H4652, H4656, H4666, H6545 by Original Mansel

I was skeptical. I have about a 25% success rate when it comes to buying any LED. That's success. I installed them on a Chevy W4500 (aka Isuzu NPR). This purchase comes with 4 lights. After installing only 2 of these they are already much brighter than the old brazed halogen headlights. I almost saved the other 2 headlights for another truck, but who cares and installed them too. And the light is focused where you need it. It's not one of those crappy headlights that blind everyone but don't illuminate the area directly in front of the car. The sentence was good. No modifications had to be made. As for the wiring. Many vehicles require wiring changes. This is because this light (and most LED bulbs) are polarized. Halogen headlights not. This means that halogen light doesn't care about polarity (which pin is positive and which is negative). The LED will only work if the polarity is correct. That is, there is a negative conclusion and a positive conclusion. If they are swapped, it will not light up. In many cars, headlights are connected in a strange way. They could do this because halogens are not polarized. For example on my truck when the low beams are off, the + and + wires. When the headlights are on, they are + and -. The same applies to high beam. So instead of permanently connecting the headlights to ground and cycling the + wire on and off, my headlights did the opposite. Even with the lights off and the ignition off, all the wires to the headlights had +12V. So I had to hook up two relays and a fuse to make it work. Other than the two hours it took me to hook everything up, I had no problems.