These bulbs have a very good PAR rating when combined with electronic ballasts. I use the galaxy electronic ballast, and wow are these bulbs making a huge difference in my tank. Ive been using them for a year and a half, and I love them. On an electronic ballast they are a little whiter than on standard ballasts. They definitely help my corals to be very colorful without the tank being too blue! I even added some T5 actinics to blue it up a little to my taste. If you want a great bulb, but don't like the look of the 20k bulbs, Id definitely try these. You wont be disappointed!

I run three of these 20k bulbs on galaxy electronic ballast. They have a nice blue tint to them which really makes the coral and fish look nice. I don't run any actinics but with these bulbs i don't think their is any need to!