Review on 🔦 Partsam 4x6 6x4 inch LED Headlights Rectangular Sealed Beam Headlamp H4651 H4652 H4656 H4666 H6545 H4 Socket Hi/Lo Beam Compatible with Peterbilt 379, Kenworth W900, Chevy GMC K5 K10 K20 W3500 by Joshua Mccall

A few things you might want to know about replacing your OEM headlights with Partsam Closed Beam headlights. I tested my OEM Sylvania headlights (out of car) for beam projection. A high setting projects the beam at a greater angle than a low setting; In a car, the low beam should be aimed at the area in front of the car and gradually reach the ground, while the high beam is aimed straight out. Partsam's headlights are designed for both low and high beam, so you only need to adjust slightly to use low beam. Besides that; My car has four headlights, but I accidentally bought a set with two headlights. I asked if it was possible to buy extra high beam bulbs and was told I would have to buy a set of four headlights. IMHO I could buy two more bulbs (like the first two) and wire both high and high beam bulbs together if I was interested!