I have changed the lights in all my vehicles to LED bulb replacement. On the older PU's I went on line and bought the H4 glass housings and installed the LED bulbs. BIG difference in light projection! One thing I found is that the fluteing on the H4 glass housings is for halogen bulbs. This does cause a slight problem on the beam pattern. I found out that the H4 LED spins in it's base and can be twisted to find a proper beam pattern. Putt he LED bulb in the housing and hook up to a voltage source and shine the bulb against a large flat surface to see the beam pattern. IF it is not what you like see if the bulb housing will twist cw/ccw to adjust the pattern. Mine did and I was able to adjust for the beam pattern .