I was running it til day 40 that switched to the bigger light. I like the light it is lightweight but runs extremely cool. It has a little less yellow light than any of my other lights. The plant were growing so big despite being in 3 gals it was to tight so I had to move them over. I am running G H Flouranova this run. I still did not do par testing yet, but the eye test tells you nice even light.
My Atreums the ARA 41s, are all white and deep red. No yellow.