How much T5 Lighting for a 75?

[kookerson]

I would really like to start keeping clams.....but I only want to use T5's.......how many do you think I would need?

 

[skinz78]

on my old 75 I had a tek 6 bulb t5 and successfully kept all of the tridacnid clams. Just as long as your fixture has individual reflectors you would be fine with 4-6 bulbs