48x30x21 SPS dominant lighting

[sparkie600v]

Hi reefers a few questions please
New build 48 x 30 x 21 tall peninsula will be SPS dominant.
I have 3 hydra 52hd's from a previous tank. Should I use all 3 or just 2? what should the mounting orientation and spacing be? I thinking bare bottom also. Any thoughts on painting the bottom glass white?
Thanks.

 

[Reefing102]

If no dividers I’d use all 3 and run perpendicular to to the front pane. If painting the glass bottom, I’d probably paint the outside due to scratching from the inside. I should say I tend to overkill lighting so I’d probably go with 6 Hydras due to the width (ran parallel) and preventing shadowing but that’s just me lol

 

[griss]

If no dividers I’d use all 3 and run perpendicular to to the front pane. If painting the glass bottom, I’d probably paint the outside due to scratching from the inside. I should say I tend to overkill lighting so I’d probably go with 6 Hydras due to the width (ran parallel) and preventing shadowing but that’s just me lol

This dude knows LEDs, so I’ll defer to him.