On my 6 ft 150 I run 3 and the coverage is laughable. I've been told recently I will need 6. That means you will need 12. Vivid has a HUGE number of radions on their shop tank. And when they upgrade the lights.....? You get to pay another 150-250 bucks a piece to upgrade.
I'm going to MH & T5. It's cheaper :deadhorse: