Led help.

Do you have a center brace on your tank or no? Also the 16x8 fixture (which I think I am rightly assuming is a reefbreeders one or similar d120) can cover 36" with some shadows on the side. Here is what I got off the reefbreeders site,

"Each fixture measures 16" long x 8.5" wide, x 2.5" tall, and covers a 24" cube for sps, and a 36" long area for sps in the middle, and lps/softies on the edges."

If you have 6" on each side where there are lps or soft corals you would be fine, however if you have sps on that side I would say that you would have to get another fixture of some type.

They do make a 24" fixture that would have covered you just fine, and it is controllable, but more expensive obviously.

If you are worried about try out 2 par 38's on each side and they wouldnt spill, if you get the gooseneck from reefbreeders it may actually look cool too, and they could be angled howveer you want. Here is a link to some quick ones I found on the internet for different prices.

www.amazon.com/dp/B004L5EZQU/ref=asc_df_B004L5EZQU2610948?smid=ATVPDKIKX0DER&tag=nextagus0019805-20&linkCode=asn&creative=395093&creativeASIN=B004L5EZQU

www.drsfostersmith.com/product/prod_display.cfm?pcatid=23655&cmpid=03csent&ref=3665&subref=AA&CA_6C15C=1059611413

The par38s won't have the light spillover that you would encounter with 2 fixtures, but are not as powerful. Or you could get 60 degree lenses for 2 fixtures which are cheap, but you have to buy the 2nd fixture. There really are a lot of options. The real key for me would be what I want to see because I am doing open top, which is sounds like you have because you are worried about light spill over, and because you are running an sps dominated tank the decision is difficult to make. Either way I think it will look great whatever you do!

Thank you I do have softies on the side. I can move any acros. Dunno about the strips if they cost 50 each I can just get another fixture.

Then you should be set with your current setup. Unless you want more light. I would see how it looks and if it works for you then you don't have to buy another!

FYI

36 x 18 x 18 = 11,664 sqin

11,664 / 231 (231 sqin in a gallon) = 50.49 gal

I think your tank would look best with the 2 leds and their 8" side facing front. If need be just dial them down a bit and have niiice full coverage that so many others go without

Is that the reef breeders value or the cheaper version not from RB?