yup... mh/hps switchable. I've had 2 failed summer grows and this, my third, winter grow is going along swimmingly.
What did you do about keeping temps down in the summer?
that's great to hear. I chose a 250 over a 400 'cos I was worried about heat in my small space. So far so good in the veg phase with three plants. Just moved into 12/12 tonite. Thanks for the report.