AI light on 20 Gallon Long

[jaceykirkpatrick]

Hi! I have a lighting question. I have a 20 gallon AIO mixed reef with one AI Prime 16HD on it in the middle. A worker at my lfs told me I probably needed two lights on it if I plan to have any SPS/high-light corals. My tanks is about 24x14x14. Should I buy a second light?

 

[Lokipsl]

It all depends on how many high light corals you want to have. You can keep one right under the hotspot of the ai

 

[Mav88]

There is a BRS video that shows the par rating and spread at various heights, worth a watch since you have one.

 

[langhuang]

There AI Prime 16HD is enough for your 20G sps-corals ,before I also have the same tank and Light with you , the sps corals are very good.