Is the driver dimable? If you put optics on there it will focus the light making it stronger and you will most likely burn stuff. Don't underestimate LEDs, they pack a punch. Also make sure they don't overheat, that piece of aluminum doesn't look very thick and in that housing the heat can't dissipate that well. Just something to thing about. I just picked up one of these tanks today and will be upgrading the LEDs also. I'm thinking of using a 1.4x12" anodized heatsink from rapidled. Will you modding the filtration at all?