Artemis metal halide bulbs
I am using the 400w 20k version and the PAR is similar to coralvue, icecap and sps bulb that I have tested them against. I get 1000+ PAR just under the waters surface, 800+ PAR at 5" below the water and 400+ PAR on the sand bed.
I bought both the 14k and 20k a year ago but the 14k didn't have enough blue in them for me. The 20k's are much better. Although they are not as nice to the eye as a Radium which in my opinion is the nicest bulb out there hands down. (all preference as to what you like) I just can't afford the Radium because they are suppose to be run on pulse style ballasts which produces 360w. When running on a electronic or digital ballast they overdrive the bulb and cause a 40% loss of PAR by 6 months. Replacing the radiums every 6 months is just to expensive for me so I have compromised with this bulb which is just as nice as any other Metal Halide bulb on the market (that i have seen) except the truly unique Radiums.