If you are washing a ceiling you’ll only need a pair of these and nothing else! The design of the the units allows 180 degrees of wash cover, and as has been mentioned in other reviews, these units are very bright. I use with DMX control and actually find it beneficial to dim them down a bit. I also find myself keeping these aimed upwards on an overhead bar to avoid blinding the audience! These lights are smaller than I had anticipated they were going to be, so if you’re mounting on an overhead bar they won’t take up too much room. There are a lot of control options available and a quick read through of the manual will guide you through these. These units are nice as “eye-candy” too with some great built in chase and colour patterns that can be run in Sound-to-light mode, the UV is a nice addition allowing for better colour mixing and some great Hot Pinks and Blue hues, and of course the RGBAW+UV also allows for normal selection from thousands of possible shades. Altogether a very good product which is up to normal good quality expected from Chauvet. Space saving, bright with lots of control options and will cover a huge area – what’s not to like! Gets 5 stars from me – highly recommended – buy a pair and you’ll be able to wash the whole dance floor and ceiling.