4x54W Tek Light T5 HO on a 75 gallon?

Enough light for SPS, in the upper half at least?

Link to the one I'm eyeballing: http://www.reefgeek.com/lighting/T5...igh-Output_Fixture_(Black)_by_Sunlight_Supply

I understand how important bulb selection is, so I'd welcome your thoughts on that as well, especially since this unit comes without bulbs.

 

Why not a 2 x 150w HQI setup w/ 2x 5w T5HO?

 

I would go with 6x54w T5 if you really want to keep sps. You won't get nearly as good color and growth if you use 4x54 on a 75.

 

That's exactly what I was originally thinking, actually. Figured I'd build my own canopy and buy retro kits. But the more I looked at it, it seemed I could just buy a ready made t5 light for the same money and save the hassle.

Was I wrong?

 

You can get a new 6 bulb t5 light with 3 power cords and moon lights and legs and individual reflectors(on the bay) from a store Torontofalls211 with buy it now for about 280. I bought one recently and am very happy with it. It is about the same price as the 4 bulb unit you listed.

 

id just go on ebay and buy a hood with metal halides t5s and atenics got mine yor 300$

 

Just be careful of what you buy its all about the ballast and bulbs. Thats why I would go with the TEK

 

I have 4x54 tek t5s and was bleaching lps in the middle of my rocks. SPS were definitely thriving when water parameters were stable. But I agree 6 T5s gives more versatility towards color.

 

Okay, six bulbs it is. Should I go three 10K's and three 420 actinics?

 

it depends on what color suits you. If you want a little bluer look, you can go with 12,000k white actinic bulbs, or just a combination. One of the great things about T5 lighting is the variety of bulbs that are offered.