do mh run hotter than hps?

goatslayer

goatslayer

Active Member
I just hook up mh hortilux blue and my room is running 2-3 hotter than it did with the hps is this normal or is it seasonal change?:wall:
 
jawbrodt

jawbrodt

Well-Known Member
I think my 400 watt MH used to run cooler than my 400 watt HPS, or at least it sure seemed like it. That makes sense due to the fact that an HPS puts out quite a bit more light, therefore more heat. :cool:
 
S

SickSadLittleWorld

Well-Known Member
jawbrodt said:
That makes sense due to the fact that an HPS puts out quite a bit more light, therefore more heat. :cool:
Click to expand...
That would be true if they were equally efficient, which they are not. MH is about a third less efficient at producing light than a HPS. If it isn't producing light, its producing heat.

Incandescent bulbs vs CFL for example.
 
jawbrodt

jawbrodt

Well-Known Member
Okay, yeah, that makes sense. I only used my 400 MH for about a week, before I ditched that piece of crap and switched back to fluoros.LOL Watt for watt, MH can't compete, IMO.(sorry to drift off topic.LOL)
 
jawbrodt

jawbrodt

Well-Known Member
^No doubt, especially if you aren't vegging some monster plants. :cool: I like using them for plants that are no bigger than 18", because then light penetration starts to become a problem and they stretch a little.
 
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