Hi,
I have Aqaone lights sitting under the house not being use at the moment they have freshwater 36W ATI BR-HG bulbs in them that I used on my freshwater tanks the lights are 48" long and I have two of them with two bulbs in each light, they would run the full lenght of the sump and the screen would be 80" X 9" for a 420 gallon reef.
I would put the lights on the outside of the glass and hang the screens on the inside to water level would these lights be ok to use they are the bigger bulb t8's not t5's