New lighting for a 120 G reef tank.

[Nashlake]

I am building a new hood with updated lighting for my 120 gal mixed reef tank. Mostly SPS with clams with a few LPS. 48" x 24" x24"

I am currently using a hood originally made to fit a 90 (18" wide) gal tank made for VHO and later converted to (2) 400 W MH with spider reflectors and Lumatek electronic ballasts. I am currently using 14K mogul end bulbs

On my new system I am planning on using 2 Hamilton Cayman Sun - 400 Watt HQI Reflectors and either (1) or (2) Hamilton Aruba Sun T5 Retrofit fixtures. The Hamilton T5 fixtures each hold (2) bulbs.
I will probably stick with 14K bulbs for the MH and add actinic or blue-plus bulbs with the T5

The MH reflectors are 12" wide and the T5 fixtures are 5" (total of 10"

The total width of all fixtures is 22" on a 24" wide tank.

I have plenty of light with the (2) 400W MH and will probably increase it with the improved reflectors but want to add the actinic with the T5 and I am looking to have coverage over most of the tank. Not sure if (2) T5 bulbs would be enough.

Am I leaving enough room between fixtures or should I use only one T5 fixture? I know the hood will be full and need to address the heating issues.


Any suggestions or recommendations would be appreciated.

 

[ReefTankHunter]

Sounds like alot in there.Is it a closed canopy.If so you Will most likely need a chiller.

 

[Nashlake]

The top of the canopy will be open with doors on the front and on both sides if additional ventilation is needed.
The lights heat the tank in the winter (at least during the day) and with a basement sump and a room AC unit temps have been manageable in the summer.