is there a light fixture with...

[Bloodasp]

According to a few things I have read no type of lighting can match the amount of light that the sun generates where corals naturally inhabit. So in saying that the more lighting you have the better, depending on the amount you want to spend, the cooling system you have for your tank as those lights will generate a lot of heat, the monthly electric bill you want to pay and of course the space constraints. Though to be honest I am running less than what you have right now on a 70 gal and my corals are doing ok, they could probably do better with a higher amount but i'll deal with adding more lighting when I am able.