I have two gen 5 XR 15 pros on my tank and have concluded they were not putting out the par numbers I thought they were. I was going off tested internet posts that showed par numbers at specific intensities in similar size tanks.
As such I have been slowly raising my intensity and the corals seem to be really loving it. I only have a phone app par checker which I'm sure is off quite a bit but one thing I found very confusing. My left light seems to be putting out way lower par then the right. Like 30 points lower. Is this unusual for 2 lights to be so far off? They are on the AB plus schedule. Visually I can't tell any spectrum or intensity differences. Is one light possibly older then the other and losing intensity now?
As such I have been slowly raising my intensity and the corals seem to be really loving it. I only have a phone app par checker which I'm sure is off quite a bit but one thing I found very confusing. My left light seems to be putting out way lower par then the right. Like 30 points lower. Is this unusual for 2 lights to be so far off? They are on the AB plus schedule. Visually I can't tell any spectrum or intensity differences. Is one light possibly older then the other and losing intensity now?