mushaboom;

I have two Procyon 100's, that I use in my mother room. I replaced 2-400watt MH covering about 4'x6'. I did not do a direct swap, but instead put them side by side, with a 6" fan facing down between them, and mounted them on a light bar. It appears to have the same growth times, as I have had for over four months now, and the moms have stayed right on schedule.