Don't know what to do, some input on lighting please.....

[The Grizz]

Well I have had the 8 footer running for awhile now but don't know if my lighting is working.

A little back ground on the tank:

tank dimensions: 96"L x 22"W x 18"D

lighting: 4 - 4 bulb T5HO fixtures, all KZ bulbs (Fuji Purple, Coral Light, Super Blue and New Gen) Lighting on timers to come on starting at 9am. Full lighting by noon and start to go off at 6pm. All lights off at 9pm when night LEDS come on until 5am

Coral stock: LPS, leathers, Mushroom, Zoa's, Clams

Most of the coral are happy and growing great but the clams don't seem to be opening as much as others I have seen in other tanks. So my question is should I change 2 of my fixture's out for MH/T5 combo's are is there a better T5 bulb combination.

What are your thoughts??