Freakin' rocks. I mounted 1 of 2 on the front of my roof basket, and the other on the rear. Dang these lights would make the Sun look for some shades, they're that bright. At only 75w, the LED chips help me save my battery. Don't come at me with your brights on along a winding back road. I'll show you bright. Also don't tailgate me, or I'll light up your life. Jokes, don't use them on public roads, but on the trail they make night into day. I thought 13.5" might be too small, but they fit the scale of my truck and rack, and are not lacking in brightness.Love them, DaveO