My stan sloan came with 2 blubs, 1 white, 1 black. I got a replacement black bulb at wally world, and use 2 blacks. It's a lot brighter the the hoppy's. The hoppy's is lower profile, and seems to be built "tougher". I like them both, i got the 'sloan off e-bay, and the hoppy's from b.p.s....tr