Crazy simple to install. Same as swapping out a normal bulb. No tools needed. Super bright. I almost feel bad for oncoming drivers since it’s so bright, but my van does have projection , so it has the cutoff line that is supposed to help with that. The light pattern appears mostly the same as the stock lights, just several times brighter. The cutoff line might be slightly higher (which is a good thing, according to my wife), but hardly noticeable.