Hey Rare1a1, they are 6" with 9 leds. Bought them on EBAY. I have 6" round halogen on the rear of cab that came from tractor supply for less than 20 bucks, I actully like them better than the leds.
The leds are 1980 lumens. The halogens seem to light up a much larger area. the led lights throw the beam straight off the face of the light and I"ve found that i can"t get them adjusted so that I don't get a certain amount of glare on the windsheild. Thinking about switching the leds to the rear.