Lighting

With Great help from you guys, Light rack plan was finalized.

And after minor modification Light rack was finally done.

90 Degree crners used to fix the Lumenbrights in position

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Ran some Par meter reading on a couple of friends tanks and realized their Par readings were way lower than what I see on most tanks running LEDs and MH with MH ballasts and reflectors made for aquarium use.
First tank (Youssef Tank) runs with 5 150 W MH in regular outdoors MH reflectors and ballasts and 3 lines of T5 for supplementation. Tank is 200x55x70 cm (80x22x28")
Par reading was 300 just under water surface and most corals on top getting around 200 on the top. Sps on mid ...

Hi,
I'm finalizing the design of the light rack for my tank and would appreciate help on the following questions.
Tank is 88x34x30
Lights planned:
3 LB mini (16x16x7) 250 w with Coralvue dimmable ballasts and a couple of T5 lines on the front and back:

Points I need help with:
-Hanging height (I remember it was 16-18 inch from water to bulb) should I raise them more as I'm only using 3
-T5s in between the bulbs from front to back? would ...