Grow out tank lighting

[SpSDrew]

Tank is 72" x 36" x 15". SPS dominated grow out system

Lighting: 6 x 250 watt radium halides in Reefbrite fixtures with 4x 72" Reefbrite XHOs

Please give me your input or suggestions on the above plan. Goal is 300-400 PAR throughout the entire tank. Lights will be ~12" off the water.

 

[Spare time]

Depending on the SPS, you might want a section with a par value lower than 300 if the goal is to have fast growth.

 

[jmichaelh7]

Depending on the SPS, you might want a section with a par value lower than 300 if the goal is to have fast growth.

Why would there need to be a section lower than 300 for faster growth

 

[Bpb]

I’d change them out to 10,000k or 6500k bulbs personally but your plan will work fine as well

 

[Spare time]

Why would there need to be a section lower than 300 for faster growth

If you hit photosaturation, their growth rate drops tremendously. It's easy to hit that value, especially with heavily blue lights