I have same size tank and lights. Par meter them yesterday and was shocked at how low the par was. Fine for LPS and softs but SPS will require 100% on the AB setting just to get 250 at the top rocks.I have 2 xr15 g5 blues over my 3ft mixed reef. Abplus at 75% intensity seems to be doing the job for now. My sps are still small. Not quite colonys yet. I will probably have to add a 3rd as my sps grow and shade eather.
If you're doing a canopy then T5s with the LEDs for the winIf I was doing SPS in a 4 foot, I would do 4 xr 15's. Maybe even two LED bars on a 24 inch wide tank. Not talking about frags tho. I just don't think they have the umph to reach all parts on a wider tank with adequate light.
Personally, when I decide to add more lights, I will probably toss some kessils in next to the radions and some led bars, nice mix of led's I think will be even better. Just might need a floating canopy to make it clean.
I agree. I decided that I will start just with two and I will add more as needed.I think a more appropriate question would be “SHOULD you light a 48x24x24 tank with Judy two xr15”. You can light that tank with one. You can run the tank with NONE. You just have to manage your expectations.
I thought about 2 XR30's which would be the best I could do or 4x XR15's. I decided to go with the XR15's because I like how it looksI have a mixed reef in a 4ft tank with two XR30 Gen 5s. It’s really good. I maybe could have gotten away with 3 XR15s, but I’m glad I have two XR30s.