Lighting for sump/ refugium

[bushwacker]

I am in the process of upgrading my 55gal reef to a build in 250gal octagon reef. I will be running ~8000gph water flow and a 50 gal sump/ refugium. My refugium will house a 4-5" live sand bed, live rock and micro algae. My question is what kind of light do I need for the Refugium? Will 48W of T5 HO be good enough? Thanks

 

[fatcat]

You could keep coral under those lights,they will work great for micro algae.
Try to find 6500K bulbs.