View Full Version : photon V2 48 vs 2 x 400w radiums

02/11/2016, 10:01 AM
If I switched lights from 2x400w radiums for the photon v2 48 over my 4' 120g, should I start at 100% or would the photon even be close to PAR?
thanks, rod

02/11/2016, 02:24 PM
Hi Rod,

The Photon 48-V2 is the equivalent of about 500watts of mh, I would recommend 2 units if you want to be near your current output, however one will work on a 120 gallon tank about 8-10" off of the water.