CannaWizard's (AMC) Lounge

jamiesname

jamiesname

Well-Known Member
I've read a lot of posts on here about how a CMH is better than a HPS or MH. I understand that it has a much broader spectrum, but the lumen output is roughly a third less than a HPS. 400w Philips CMH = 34800 initial lumens. 400w Philips HPS = 50000 initial lumens. Not only does the CMH have less lumens, roughly half of those lumens are in the blue spectrum, while nearly all of the lumens for a HPS are in the red spectrum. I know that lighting is not all about lumen output, but that's quite a difference in lumens and if I'm going to use 400w per hour regardless, I'd want those lumens to be in the red spectrum for flowering.

I would absolutely love to switch to the CMH but the lumen issue really trips me up.

Pertaining to UV I can easily understand how a CMH would be better than a HPS in that department, but people are swearing up and down that these bulbs are the best thing since sliced bread and I'm finding it difficult to believe that.
 
cannawizard

cannawizard

Well-Known Member
jamiesname said:
I've read a lot of posts on here about how a CMH is better than a HPS or MH. I understand that it has a much broader spectrum, but the lumen output is roughly a third less than a HPS. 400w Philips CMH = 34800 initial lumens. 400w Philips HPS = 50000 initial lumens. Not only does the CMH have less lumens, roughly half of those lumens are in the blue spectrum, while nearly all of the lumens for a HPS are in the red spectrum. I know that lighting is not all about lumen output, but that's quite a difference in lumens and if I'm going to use 400w per hour regardless, I'd want those lumens to be in the red spectrum for flowering.

I would absolutely love to switch to the CMH but the lumen issue really trips me up.

Pertaining to UV I can easily understand how a CMH would be better than a HPS in that department, but people are swearing up and down that these bulbs are the best thing since sliced bread and I'm finding it difficult to believe that.
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*diggin the avatar, fear the reaper ;)
 
M

midwestmmj

Well-Known Member
man! nice lab brother! i love that bud porn. im flippin tonight, stop by my grow and check it out. remember me from the dubstep thread.
 
rosecitypapa

rosecitypapa

Active Member
stelthy said:


Hi again just thought I'd show y'all a pic of my latest update..,. I've added 2x 125W CFL Side-Lighting so in VEG I'am running 1x 125W Red Spec CFL, and a 250w MH.. then in Flower I'll be running 2x 125W Blue Spec CFL's, a 400W HPS + 20% Boost, a UV-B tube and I also have the Green Neon tube as my Night Light..


I am going to hunt down a KESSIL 150W LED and that should help me catch the Extreme REDS so I should be more or less running a Full Spectrum minus UV-C and Infra Red :) I know UV-C is bad for plants and people but does anyone know if Infra Red plays a part in Plant Growth at all ??? - STELTHY :leaf:
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I don't have an answer to your question, but I love your setup. It shows lots of care and attention to detail. I've got two 400w CMH's coming and plan to still use the reptile lights as well.
 
cannawizard

cannawizard

Well-Known Member
*CMH wont give you the uvb lvls you need to 'get' any viable results :) ., uvb 10.0 reptile bulbs will work.

--cheers
 
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