It's time to replace bulbs for my 200 gallon tank. I currently have 2-160 watt VHO's and 3-250 10K Metal Halides. My question is should I stay with the 10K Metal Halides or go with something higher? If so, why?
Doug McIntyre just gave a presentation on lighting. Doug's preference for lighting would be an electronic ballast from IceCap for the double ended metal halide bulb 250W 10,000 Kelvin and the use of actinic fluorescent bulbs.
Ironically, the bulb which benefits SPS and LPS corals the most is the 10K HQI bulb, which has a whitish yellow-blue color. The second best bulb is the Iwasaki 6.5K bulb, which gives off a yellowish-green color.
If you check our ARC website you will find the rest of the story.
ive experimented with 4 different 250 halides and i like the 10k ushios the best. i run them in 400 watt and 250. ive experienced problems with the aqualine bulbs they quit working (2 bulbs)very fast. the 12k sunburst looses its intensity in three months. the iwasaki is just plain ugly.
We use Icecap ballasts with Aqualine bulbs. Sounds like we should stay with the 10K's. I'm not dissatisfied with what we have. I guess I was just curious what the difference would be with the 12K or 14K bulbs. But since we already have actinics, I was wondering if the light would be too blue.