One or Two LED fixtures for a 40b

[jhowerton]

I'm building a 40b for SPS, is one RB 120w value fixture enough or should I get two?

Thanks
...JIM...

[Stomatopod1701]

one would work if it is mounted high enough and you were using 120 degree optics.

[TL1000RSquid]

I have 16" RB over my 29g, I'd say it just barely covers it, on a 40b you will probably have somewhat noticeable dark spots on the sides. Photon 24 is cheaper then 2 of the values, its what I think I'll be putting over my 40b when upgrade the lighting. Plus the controller will be nice to have I kind of regret going value over the photon for my 29.

[bskiba]

depends on the how high it is above the tank. generally yes it will cover 24-30 inches with no optics. unless you have coral touching the very sides of the tank then it would be fine. I have one over a 60 cube and it works perfectly.

[jhowerton]

Thanks for the advice, I was looking at the Photon 24 also.

[Stomatopod1701]

the photn 24 would be better than one value fixture if you can swing it and the controller is very nice!

[SpartaReef]

I have a used reefbreeders for a fair price. 1year old and works pretty good, I'll either sell it and upgrade or replace some of the LEDs in it for my 55g.

I think it is too blue.

[jhowerton]

Thanks for the advice I think I'm going to go with the Photon24. One more question 60, 90, 0r 120 degree optics?

[Mark Bianco]

The higher degree of optics the better the spread. The lower the degree smaller spread but greater / deeper penetration. For the 40b that's a fairly shallow tank. I would think 120 would be want you want.