Advice on how many LED's and Optics for 90 gals sps reef tank

[Midway]

Hi there,

I would like to start a project to make my own LED fixture with LED lights. I'm planing to setup a 90 gals sps tank. how many LEDs do I need to grow sps corals in a 90 gals reef tank?

What about optics? I'm thinking about 80 degree optics? what do you guys think?

Tank measures: 4ft Long, 2ft tall and 1 1/2f wide (front to back) so this tank is kind of deep I think.

Any advices from people that already did some LED work, would be much appreciated.

Thanks,

Manny