"If your looking for a good light for the cost I just did a PAR test on a Maxspec Razor. These readings were on a 60gal cube. Also just to give you a reference I also measured a friends MH 20K bulbs and got close to the same reading. Now the Maxspect R420R readings were 670 on the top 6 to 10 inches, below that 400 from 10 to 20 and 300 to the sand bed. Very good results when you compare them to the MH which was 600 at the top down to around 8 inches, 550 in the middle section of the tank and 420 at the sand bed"
how deep was the sand bed you were measuring? i have a 72x18x29high sanded, minus the 4 inch deep sanded, we are talking 25 inches of water from the top of the tank. that's not including the 6-8inches the legs lift it off the top of the tank. I want so badly to get the r420r, but can't find anybody with real experience and measurements. I can't even find anybody to tell me how many watts per led is this thing putting out. get that for some real weird news. it is something almost every manufacturer of leds will post on their advertisemt but seem to be a national secret with this company. I even called and they can't or won't tell me. what gives. again i want so much for this to work and i would buy 3 of them. ive got a totally dry tank sitting in my living room. .