You need more than 3 of either to keep SPS. Of the 2, I prefer the Kessils. They do make a nice shimmer if the water surface isn't too turbulent. There are much more complete options out there like the Pacific Sun Pandora that could cover the tank with 1 fixture.
The Radion G3 Pro is a considerably more powerful fixture than the Kessil 360W-E (roughly double the wattage). I would think, considering the shallow depth of your tank, that 3 Radion G3 Pros mounted every 1-3/4 feet along the length of the tank would be sufficient for the intensity required for an SPS tank. My guess would be that 5 Kessil 360W-E's would be required to give you the rough equivalent for intensity/coverage.
The Ecotechs are considerably more sophisticated in terms of spectrum tenability, but not everyone wants that complexity.
3 kessils over that tank about 18-24 inches over water WILL cover the tank. The issue is will it have the intensity to support the SPS... Probably not. Soft corals, mostly yes.
You can get 3 kessils and hang them up high, play with them a little, if not satisfied return them.
I have a 600 gallon 8' x 4' FOWLR lit with 2 A360s. So yes, each one can cover a 48" by 48" space if 24" in the air. But I have no corals......
You are going to need a ton of light for that size tank.
If you are not prepared to drop some cash to light that tank, I would venture down the DIY route. Even then, you are still looking at a nice expense.
You are going to need a ton of light for that size tank.
If you are not prepared to drop some cash to light that tank, I would venture down the DIY route. Even then, you are still looking at a nice expense.
3 kessils over that tank about 18-24 inches over water WILL cover the tank. The issue is will it have the intensity to support the SPS... Probably not. Soft corals, mostly yes.
You can get 3 kessils and hang them up high, play with them a little, if not satisfied return them.
I have a 600 gallon 8' x 4' FOWLR lit with 2 A360s. So yes, each one can cover a 48" by 48" space if 24" in the air. But I have no corals......
imo on a tank that size your going to need at least 6 of either of those lights. Trying to get away with a minimum amount of lights for an sps tank especially when it comes to leds is going to lead to your coral only getting light on the tops and what's directly in the path of the fixtures. If you go that route you will have to add more fixtures down the road for sure. Once the corals grow there will be a lot of shading going on and the corals towards the outside will suffer.
Fwiw i have a friend with a standard 120g sps tank and he's running 3 radions and still has shading issues due to how focused the lights are and is planning on adding another and changing the orientation and possibly adding t5 along with it to help the bases of the corals to get some light.
All just my opinion and what i've seen with the few radion tanks i've in person. At first you may get away with fewer lights but once it starts growing the shading really starts setting in its really obvious the you need more fixtures with overlapping spread to light the tank properly for sps at least.
This dimensions sound awesome =) good luck..
I don't think he'll need 6 lights over a 7ft tank. my 4 kessils easily cover 6ft. if he's going to shoot for the 360n's, maybe he'd need 6... but only 24" depth he wouldn't need them