400 watt CMH with old magnetic ballast

hillbill · Jul 25, 2019

hillbill said:
I ran those CMH bulbs for years and they need standard hps magnetic ballast and are most definitely Open Rated. 400w much more efficient than the 250w. Best results used with hps. Beautiful light and very happy plants and excellent trich and terps development.
Just never seemed to make buds tighten up. I still have bulbs, some are new.

All COBs and white or white/red led panels these days.

Didn’t realize post was ancient!

Didn’t realize post was ancient

rkymtnman · Jul 25, 2019

2 year old thread is hardly ancient but whatever.

GoBrah · Jul 25, 2019

Renfro said:
That was just a MH conversion bulb in the old post. Not a CMH. To my knowledge nobody is selling a 400 w CMH conversion bulb yet. @GoBrah may have some answers as his company was working on some.

Yes, we have CMH400WSE horticultural bulb, but we are now on summer holiday...because of the heat.
Will back in office in the beginning of August, and have more test feedbacks.

400 watt CMH with old magnetic ballast

hillbill

Well-Known Member

rkymtnman

Well-Known Member

GoBrah

Active Member