CRookSkee
Member
So im wondering if my radium 20k 400w bulbs are defective the reason why is because compared to my old hamilton tech 10ks par is not even close. My old 10ks where showing around 800+ par at the water level and my radiums around 340 par. Is that normal or should i be concerned ? Fixture is around 12 inches from the water surface. Once im home i will test one 10k to one 20k and compare and post up on here to see if that is normal for the 20k to be super low in par. I thought id have more since its a 400w bulb. Powering them with m59 ballasts.
Manny
Manny