Mh Vs Hps The Truth And Results

I'm beginning to think that the reds produce bigger, fluffy buds, and of course this looks like a bigger yeild and probably you seem to get more smoke, but do you really? As with the blue's the buds may be more compact and they may not chop out as much and might not look as big but do you really get less? I read the MH have more uvb so you may actually get more compact resinous buds with the blue's.

Has anyone that reads this actually done a test with two clones from the same plant, flowered with MH for one, flowered with HPS for the other then dried and weighed thier results? Until this is done I think really its just heresay and peoples opinions, what we need is hard facts and someone with the resources to do such a test. Of course the plants need a certain amount of light of each red and blue, but how much and how much variation is there from starin to strain, this I don't think anyone would know exactly, so again, we need a test.

Anyone up for it?

Or I guess you could just get the best of both world's and do a grow with both types, but not everyone has that luxury I guess. I think the majority of people on here will do something that works, then stick to those principals and try to get bigger yeilds by giving the plants a better environment and or better nutes.

We need a mule people, cmon one of you "veteran smokers" venture out for the rest of the community. Start a new thread on or just reply to this one, but there has to be someone out there willing to do this and shut us all up, or at least get us keen enough to go out and spend the dosh to do our own experiments, I'm positive theres an experianced grower with enough time, space and resources to do this test for us all, will it be.....YOU ?

3waterleaves said:

I'm beginning to think that the reds produce bigger, fluffy buds, and of course this looks like a bigger yeild and probably you seem to get more smoke, but do you really? As with the blue's the buds may be more compact and they may not chop out as much and might not look as big but do you really get less? I read the MH have more uvb so you may actually get more compact resinous buds with the blue's.

Has anyone that reads this actually done a test with two clones from the same plant, flowered with MH for one, flowered with HPS for the other then dried and weighed thier results? Until this is done I think really its just heresay and peoples opinions, what we need is hard facts and someone with the resources to do such a test. Of course the plants need a certain amount of light of each red and blue, but how much and how much variation is there from starin to strain, this I don't think anyone would know exactly, so again, we need a test.

Anyone up for it?

Or I guess you could just get the best of both world's and do a grow with both types, but not everyone has that luxury I guess. I think the majority of people on here will do something that works, then stick to those principals and try to get bigger yeilds by giving the plants a better environment and or better nutes.

We need a mule people, cmon one of you "veteran smokers" venture out for the rest of the community. Start a new thread on or just reply to this one, but there has to be someone out there willing to do this and shut us all up, or at least get us keen enough to go out and spend the dosh to do our own experiments, I'm positive theres an experianced grower with enough time, space and resources to do this test for us all, will it be.....YOU ?

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im willin to do it....as soon as im willin to fork out the cash for a hps, which hasnt happened yet, gotta talk the wife into it. but for now i am using just mh for full grow, so have became extremely interested in this debate myself. i believe that you need both for the best allround results.

you're wrong... HPS produces tight, dense buds... If you flower with an MH they will be light and fluffy

bunique209 said:

you're wrong... HPS produces tight, dense buds... If you flower with an MH they will be light and fluffy

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LOL, I have heard of grows with both lights producing either or results, I think a lot has to do with the environment and nutes etc.

That is why I want someone to test this with identical environments, nutes and everything, EXCEPT the lights......

gogrow said:

im willin to do it....as soon as im willin to fork out the cash for a hps, which hasnt happened yet, gotta talk the wife into it. but for now i am using just mh for full grow, so have became extremely interested in this debate myself. i believe that you need both for the best allround results.

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Awesone, PM me your thread when you decide to do it ( if your allowed) heheh. A wife that ok with growing in the first place is ok with me.

Its all about the color spectrum now. An innovative company in Cali makes bulbs for Flower that are superior to HPS, but give the right spectrum the plants need for flower. They are called Pulse Start Metal Halides, and yes they contain UV's also. Im going to post something for you to read that the company sent me in a few email exchanges i had with them, and after my local grow store guys told me about their bulbs. I agree with this post, except that HPS are the worst light ever. Id rather have HPs any day over CFL's or FLoro's haha. But this is the future of growing, actually emulating the sun. I left a lengthy post about thier 10k bulb which is a UVA and UVB bulb that is meant for the last week of flower specifically for resin and oil production. By the way, these bulbs are called Sun Pulse Metal halides made by Life Light Technologies.


"Pulse start metal halides are a newer technology in bulbs. They make
them for core and coil, but we make the only lamps made for use on
electronic ballasts in the world. HPS light is the worst light ever for
plants, its time for them to go the way of the 8-track. We can produce
our bandwidth narrowed light, and full spectrum light, with the PSMH
technology, its far and away the best. An HPS is 2.2K, and we make a
PSMH 3K, 4K, 6.4K, and 10K. Our 3K's have more blue than the blue
enhanced HPS lamps on the market.

The 10K lamp has UVA and UVB in it, as do all of our Pulse Start Metal
Halides for core and coil and electronic ballasts, but no UVC.

There is research on the net about UV and effects on people and plants.
It also produces oils in human beings, for example. The basic premise
behind what we do is that plants, people, pets and fish all want light
like the Sun. The Sun has UV light, and we want our light to behave like
the Sun indoors, so an integral component to light is that UVA and UVB.
It's natures gift to plants to help them fight bugs, pathogens, etc. HPS
light, that people have been using for years, has no UV light at all,
and we wonder why the plants have problems. HPS light is also only 22%
or less of the Sun's color, quality and clarity. We make lamps that are
95% of the Sun, and we want our plants to get that too. Plants have
evolved with the light that hits the Earth, the visible spectrum, for
millions of years. We don't want to fight mother nature, we want to work
with it. Growers didn't reinvent lighting for plants in 20 years of
growing indoors."

Nice......*nods*

currently right now i am flowering with both metal halide and hps
i have 2mh and 2 hps that a interchange frequently so all my plants get a all round spectrum for flowering
so far i've found hps help the plants stretch more and they reach for the light
with the mh it helps keep the blues up and keeps them dense =)
ill have more results as i go on
i have been looking into what is better to flower with and for my next show i may do a report on this ill do a plant under mh, a plant under mh and hps, and a plant under hps
will see how things go but i think im pretty sure i will =)

posting to subscribe. that way i can add look more into it when im not as high.