Hanging 3 x hydra 32hd - puck direction?

Hi Everyone,
my tank is 66 x 28 deep x 20 high = 160 gallon

I am hanging a hybrid fixture over it with 3 x hydra 32 hd and 4 x T5

would you hang the hydras with the pucks left to right or front to back and why>

I want to avoid shadows.
Note the extra depth of 28"
Thanks
TIm
 
I would go left to right. I wouldn't worry about the depth. That shouldn't change either way. I'd worry more about getting coverage across the 66 inches. The t5's will help coverage also.
 
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