LED for a standard 90 gallon

[Myka]

Originally Posted by WarDog

I would go with Skimmer Juice's recommendation. Add [...] two A360's to the Tek, and you will have an amazing fixture!

I like this idea too, and I've seen this done a few times with various LED fixtures. For a 48" tank though, you'll definitely need two Kessils.

Originally Posted by WarDog

If you are dead set on only LED's, I would recommend three A360's for a 4' tank. Yes... 3.

I agree with this 100%. IMO, one of the biggest failures of LEDs is that people generally just don't use enough of them to get even spread of lighting. Then they wonder why corals do great here, but get roasted there, and turn brown over there.

Though if it was me, I be buying Radions or AI Hydras instead of Kessils.

[Aquattro]

When I used LED, I ran 6 units across a 6ft tank. I found that gave me enough coverage. You would need at least 2, probably 3 units for best coverage.