Each unit will come with two interchangeable lenses. 80 and 110 degrees. It will do a 30 inch by 30 inch area easily. Twice as strong as those other lights that are popular. There are two versions. The master unit ( the one on the left) will retail for $349 and the slave unit ( on the right) will retail for $249. The mounting arms come in two sizes, 18 and 24 inches. Pricing is not yet set on them bit I believe somewhere around $50 or so.