First let me say they are not mine. It was at the LFS I was lucky enough to be there when A customer brought them in to show the owner. I don't think it is overclocking, and I'm pretty sure Icecap has given the OK on the 54watters. Just not the 6' ones because of length. Maybe Bangguy could chime in, I believe he is in with the Icecap crowd

. I had them over my 29g about a year ago, and went back to VHO because the T5 were bright, I just was not convinved. But seeing the 4 T5 compared to the PC's in the store, forget about it the T5 blows them out of the water. Freaking bright. Better than the 48" Vho on my 90 thats for sure.