Hello Folks, Its been awhile since I posted anything. All the scrubbers are doing well but I decided to upgrade one of them. The scrubber on my 150G is a bit to small so I have built a new one that is bigger and only using Violet 420nm LED's. Bud (Floyd) and I have talked in the past about the 420, 450-ish and 660 nm LED's for their efficiency of growing algae. Years back Bud and I (along with others) switched from CFL to the Red 660nm and it was a huge difference, then we added blue 450nm and were even more impressed. Well since I have added 420nm to the mix and was just blown away by the increase in growth. So, with this test info I decided to take the 450nm out and only use 660/420nm this produced faster thicker growth as the tests showed. WELL, now its time to take the 660nm out of the picture and go 420nm all the way. This scrubber has been up Since 01/09/2016. It uses almost a full sheet of screen, may 2.5" short on the side. I have 15 420nm LED's per side and dimmable. I did get any pics of the LED's and heatsink going together as its the same as any other really. This is with the rest of the clear tinted and installed, hardly no light escapes.