Like many others, i put this over my outdoor flood lights to give my house red and green Christmas colors. Ive used lots in the past that have worked fine. The red color does work very well and casts a nice bright red color. I gave 1 star bc the green has no color at all, maybe it throws a 5 % green color compared to not usung at all. I even doubled the green and it still sucks, i got a lot to do, i aint got time for this.