which is cooler 2-150 watt hps, 1 400 watt CMH? I wold guess the 2 150 hps but if so by how much? I can do one of the two options, if its not hugely hotter(like 400 watt CMH puts out twice as much heat) I can do the CMH, which I would rather, but if the 2 150 hps are way cooler in the cab thne I can do that
which is less heat, 2-150 watt hps, 1 400 watt CMH ?
- Thread starter bobhamm
- Start date
Little Tommy
Well-Known Member
That is going to depend on if you are going to air cool the 400 watter. An air cooled 400 will be cooler than the 2 (150 watters) as they are not usually air cooled.
Little Tommy
Well-Known Member
There shouldn't be a large difference. It is a gamble depending on the size of the cabinet and proper air circulation/extraction.
Little Tommy
Well-Known Member
People are going to want to know the dimensions of the cabinet in order to make an educated suggestion.
shnkrmn
Well-Known Member
https://www.rollitup.org/groups/cmh-club.html
This guy grows with CMH lighting. And he really knows what time is it when it comes to growing. He will be able to answer your question; he's very helpful, just pm him, or post in one of his threads.
https://www.rollitup.org/grow-journals/347914-balls-wall-grow-riddleme-gets.html
This guy grows with CMH lighting. And he really knows what time is it when it comes to growing. He will be able to answer your question; he's very helpful, just pm him, or post in one of his threads.
https://www.rollitup.org/grow-journals/347914-balls-wall-grow-riddleme-gets.html
You've got a little dillemma. The two 150s will generate less heat; however hps/mh tend to "throw heat" making it harder to get your light down to the canopy. CMH will generate more heat but does not "throw heat" like an hps. The heat rises rather than beat down, something you should consider.
dnkfrmthasoilz7
Active Member
id go with the 2 hps
shnkrmn
Well-Known Member
tell me about it! anyway got a deal on a 400 watt hps, testting the heat now, still plan to get a cmh in a couple of weeks though