Metal Halide VS High Pressure Sodium

Metal Halide? High Pressure Sodium? Combination of both?

  • High Pressure Sodium

    Votes: 44 25.9%

  • Metal Halide

    Votes: 13 7.6%

  • Combination of both

    Votes: 113 66.5%
  • Total voters
    170
TillthedayiDIE420

TillthedayiDIE420

Well-Known Member
yeah dude just did 6 shots of Scotch and some bigrock lime beer and some Captain morgan private stock before and during that and shit. i was just trying to say i was going to vote HPS + MH.......

something about the MHvsHPS got me So mad i dont even know why anymore...
 
c5rftw

c5rftw

Well-Known Member
TillthedayiDIE420 said:
yeah dude just did 6 shots of Scotch and some bigrock lime beer and some Captain morgan private stock before and during that and shit. i was just trying to say i was going to vote HPS + MH.......

something about the MHvsHPS got me So mad i dont even know why anymore...
Click to expand...

your typing very well for have just ingesting that, shit.
 
vertise

vertise

Well-Known Member
i grow hps but with the new tech i say mh. hps won out in the past strictly cause of its red spectrum. Now mh meets all speectrums
 
josh b

josh b

Well-Known Member
i love the little grow u got there =) and apparently i heard hps are the best all round light for growing
 
justiceman

justiceman

Active Member
Whoa I see how people didn't like the VS comparison haha. Well generally speaking It has been known that you use MH for veg and HPS for flower. Yes both ftw. However this is a discussion about the two different HID lamps and their qualities. It is also a discussion about new lamp types like MH/HPS Hybrid bulbs, or Pulse start MH that give off a wide array of spectrum's. Agrosun Gold Halides are supposed to be a good flowering MH, or

Ushio supposedly has excellent HPS and MH.
They have a super blue MH that has red spectrum in it as well.


It's not a simple cut and dry, black and white, or good and evil kind of versus topic. This is a grey color real world versus where no one really wins completely or loses completely. It's a supposed to be a detailed discussion about MH and HPS lamp lumens spectrum and quality. If you simply believe that HPS and MH should be used together no ifs or but, no question about spectrum's or anything that's fine. Just state that. If you simply beleive that HPS is the best for all around lighting you should probably explain why. If you believe that MH spectrum is the best then post and explain why.

So far I have personally only used HPS and have had good results for veg with it. It however was hortilux super HPS that had a bit of blue in it. The whole MH usable spectrum aspect has me very interested. The fact that the 3k MH lamps are in production tingle my senses. It allows me to question whether an HPS is better then a 3k MH? Both give off red spectrum, but only the MH gives of UV, however the MH has less light intesity.

This question is for you all who use HPS in the flower room and swear by it. Have you ever done a comparison with 3k MH and normal HPS? If not doesn't the possibility exist that a 3k might outperform or do worse then an HPS. of course it does. So has anyone here even used a 3k MH?
 
S

StlSoldier531

Active Member
Brick Top said:
This "long awaited debate" is like the "Rocky" or "Lethal Weapon" flicks in how it’s actually a series of them.
　
There is no versus when it comes to MH and HPS. One, Metal Halide is for the vegetative growth stage and the other, High Pressure Sodium is for the flowering stage .. you use both .. period, the end.

Anyone who uses them in any other way either cannot afford what is needed, so they pick one and hope for the best, or they do not know enough about plant needs to post a valid comment.
Click to expand...
Metal Halide keeps them from stretching right? That alone when growing sativas indoors seems like it would be better to go Halide only from start to finish...HPS gives more yield..but if growing for personal smoke only..then yield doesn't really matter...

Height and stretching would be more of an important issue..
 
J

jayneste

Member
if you can use both mh then hps to flower when would you change over if you can only use one at a time (when you change to 12/12 or later)
 
johnnyslastwords

johnnyslastwords

Member
everybody grows in different ways. some methods are better than others for certain applications. it has been proven that MH is better suited for veg growth and HPS for flower HOWEVER this seems to be old news. maybe somebody can make a grow journal of 2 separate grows with the same strains, one using a normal MH for veg and HPS for flower, and in another room using one of the sunpulse 3k MH lamps for flower to see the difference in yield and resin production. I feel like we can go back and forth throwing ideas and insults around but it wont solve anything until someone tries out the new technology for us all to see.
 
Frankiesnote

Frankiesnote

Member
lots of good comments in this thread!

overall after all my reasearch id have to say MH and HPS are things of the past. They both work very well for growing in all stages, and one more than the other for veg and flowring. The present and future is LED.

http://www.eshinesystems.com/led-grow-light.html

Gonna try to purchase a 100W LED grow pane from eshine as soon as i can.

turns out these LED fixtures are customized specifically for growing, at 100% light spectrum absorbtion for photosynthesis. Not only do they output more than MH and HPS, but they do it in the optimal spectrum, they stay cool, electricity bill cost are reduced by at least 70%, and practically zero heat is produced.

But since this is a MH vs HPS thread, if i had to chose one, id go HPS, inspite of heat, they just seem to yield better, probablly because oh the high lumen output and the spectrum is more favorable for flowering.

But seriously, LED al the way, it even costs less to purchase.
 
U

uhavealighter?

Active Member
Frankiesnote said:
lots of good comments in this thread!

overall after all my reasearch id have to say MH and HPS are things of the past. They both work very well for growing in all stages, and one more than the other for veg and flowering. The present and future is LED.

http://www.eshinesystems.com/led-grow-light.html

Gonna try to purchase a 100W LED grow pane from eshine as soon as i can.

turns out these LED fixtures are customized specifically for growing, at 100% light spectrum absorbtion for photosynthesis. Not only do they output more than MH and HPS, but they do it in the optimal spectrum, they stay cool, electricity bill cost are reduced by at least 70%, and practically zero heat is produced.

But since this is a MH vs HPS thread, if i had to chose one, id go HPS, inspite of heat, they just seem to yield better, probably because of the high lumen output and the spectrum is more favorable for flowering.

But seriously, LED all the way, it even costs less to purchase.
Click to expand...
But seriously, you can lick my balls China Man. It turns out the best LED is one that runs off farts. My energy bill has reduced by 110% except I do have to keep a shitload of frijoles in my cupboard! And it was only $9.99. 100% photsynthetic activity is achieved. My plant told me. "Yeah Dick. Your farts give me the power of 9000."

You can get it at www.thebestLEDgrowlightever.com/fartspectrum110
 
sso

sso

Well-Known Member
the biggest difference i noticed, when growing with a mh along the hps, was that the leaves grew slightly more elongated and lots more of them

the plants looked much more "natural" as in where you cant really see the buds because of all the leaves.

didnt notice any potency change, though id want a few more runs before im sure, but i just dont have the room for it.

i add a few blue cfls to my hps though, kinda seems like the plants grow bit better with it, but im not entirely sure yet. (plus the hps has some added blue)
 
C

Cannaman3883

Member
If you can control your temps you can keep your lights nice and close and they don't stretch at all! Not that I can do it but I know someone whose tops of plants still in veg are only about 8 inch from a 1000 watt HPS! He is a well established indoor grower using no CO2 and pulling big dry weight off of each just using lsttechnique! Again maintain temps and keep that light as close as the girls can handle and use HPD all the way through! IM a NOOB as well but again this was recommended to me by a very good grower!!
 
degausspress

degausspress

Active Member
T5's are the best for vegetative or flower boosting if you want to save energy- to make them effective they can go 1-2 inches away from the plant, making up for the fact that they put out slightly less light per watt.

CMH for flowering:
Ceramic MH has fantastic spectrum but I'm not sure in practice it will be better than my choice- a 600w HPS (more efficient than 400 or 1000) WITH 3 foot T5's on the side. This 'rounds out' my spectrum with blues, UV light, etc., and trust me, the ladies love it, definitely nicer than HPS alone.

CMH has some drawbacks- the biggest drawback is 400 watt only. What good is a better spectrum if there is less light overall per square inch? A 600 normal HPS may not deliver the blues, but it definitely gives more orange-red which really drives the flower production.

I think too many are looking at the spectrum chart and not realizing it is telling you the ratios, not the raw amount of light. So even if a 400 CMH beats a 400 HPS, the fact you cant buy 600 watt is a factor here too. Just because the spectral chart looks like it gives you more light overall, is not true, that chart is telling you where the colors are distributed... I even saw one comparison of 3k versus 4k CMH, how is that fair?

Before you say to not think in lumens, I believe it is still somewhat valid because these lights DO produce visible (to human eye) light! Lumens is not valid for spiked light frequencies (LED), BUT...

BOTH HPS and CMH have lots of yellow light which is not particularly helpful to your flowers, but does show up in lumen readings.

So until someone does a PAR reading comparing CMH to HPS+T5, I'm not convinced!
(PAR is a way to measure what the plants 'see')

Also, many popular CMH lamps I am investigating are "vertical only" and use the less efficient analog ballasts only.

Ceramic Metal Halide will be added to our guide the Cannabis Pocket Reference app, however we're not going to recommend them unless for a smaller space. We're not saying they are useless for making gorgeous flowers, however, they certainly have not been proven to be the best, especially if they were in a show down of HPS+MH or +T5.
 
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