How to switch over from 250W MH to DIY fixture on 20" cube

[nerdz]

Originally Posted by TheMikey

I believe the consensus on switching from MH to LED is gradual ramping of the light intensity. Start at 30% and move up in increments on a weekly basis (i.e. 35 - 40 - 45 - 50). Watch your corals, they'll tell you if there's too much or too little light.

Thanks for input. Do most people run them 8? 10? Hrs