This is likely to be a 5 star product for a new install (but the color rating is too low). However, since they don't offer retrofittable glass mounting clips like other brands, I appreciate this for my use case (sorry guys). Also I've been looking at a lot of 2.7, 3, 3.5, 4, 5 and 6k tubes lately and although this one is listed as 4k it looks more like 5k to me. The image is quite soft compared to the existing one, so 3.5k highlights.