110,000 lumen HPS, or 76,000 lumen MH?

jawbrodt

jawbrodt

Well-Known Member
Looking for some opinions on this.....I have 2 400 watt systems in veg, and was wondering if it would be a better option to use the HPS bulbs rather than the MH bulbs(I have both)? The HPS bulbs are 55,000 lumens for a total of 110,000, and the MH are only 38,000 lumens, for a total of 76,000. That 34,000 extra lumens is almost enough to make up for another 400 watt MH system's output. It seems like the 31% more power of the HPS would make up for it's lack in the blue spectrum?

My HPS bulbs are those with that little bit of 'extra blue', and i was wondering if anybody ever tested this situation before? I'd hate to leave those HPS bulbs sitting on the shelf, when they could be doing better than what I'm running now.
 
jawbrodt

jawbrodt

Well-Known Member
^Thanks, but I have a seperate flowering room, with HPS:) I just have those HPS bulbs around, and wanted to know if the 30% extra lumens would outperform the MH's, in veg.
 
aram

aram

Member
i've seen it done so why not? or why not one HPS and one MH? you'll get 93000 lumens. enough total lumens and plenty of blue
 
jawbrodt

jawbrodt

Well-Known Member
My main concern with that, is that the blue and red won't be distributed evenly. Some plants will get mostly blue, and others will get mostly red. How do you hang the lights to get them to mix evenly? I'm a perfectionist, so it would drive me crazy to have half the plants under MH and the other half under HPS.LOL Well, the ones towards the center would be getting both HPS and MH, but the ones on the ends wouldn't. Hmm.....
 
hwy420

hwy420

Well-Known Member
jawbrodt said:
Looking for some opinions on this.....I have 2 400 watt systems in veg, and was wondering if it would be a better option to use the HPS bulbs rather than the MH bulbs(I have both)? The HPS bulbs are 55,000 lumens for a total of 110,000, and the MH are only 38,000 lumens, for a total of 76,000. That 34,000 extra lumens is almost enough to make up for another 400 watt MH system's output. It seems like the 31% more power of the HPS would make up for it's lack in the blue spectrum?

My HPS bulbs are those with that little bit of 'extra blue', and i was wondering if anybody ever tested this situation before? I'd hate to leave those HPS bulbs sitting on the shelf, when they could be doing better than what I'm running now.
Click to expand...

I read a thread on this forum somewhere that during flowering; MJ plants use twice the amount of HPS light than they would with Metal Halide. The Metal Halide blue spectrum provides optimal vegetative lighting spectrum. Definately use HPS during flowering. Metal Halide bulbs should really only be used to VEG for optimal results.
 
jawbrodt

jawbrodt

Well-Known Member
hwy420 said:
I read a thread on this forum somewhere that during flowering; MJ plants use twice the amount of HPS light than they would with Metal Halide. The Metal Halide blue spectrum provides optimal vegetative lighting spectrum. Definately use HPS during flowering. Metal Halide bulbs should really only be used to VEG for optimal results.
Click to expand...

Okay, now we're getting somewhere. That makes sense, otherwise everyone would be using HPS only, given the much higher lumens per watt. Thanks, I'll see if i can find any more info on it. :cool:
 
aram

aram

Member
jawbrodt said:
My main concern with that, is that the blue and red won't be distributed evenly. Some plants will get mostly blue, and others will get mostly red. How do you hang the lights to get them to mix evenly? I'm a perfectionist, so it would drive me crazy to have half the plants under MH and the other half under HPS.LOL Well, the ones towards the center would be getting both HPS and MH, but the ones on the ends wouldn't. Hmm.....
Click to expand...
good point. then again if your area is big enough (and willing to pay the extra consumption) you could have 2 HPS's on the side and the MH in the middle... no matter what you do some plants are gonna get more light than others..
 
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