FunTimesIndeed
Member
Awesome work, Mr. Gnome. I would love to see some more of these comparisons with clones of a variety of strains done in two separate flowering chambers, but I've seen enough to give it a try. Very cool.
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MH vs HPS in bloom
- Thread starter the gnome
- Start date
you know as technology keeps improving so does grow lights personally from my experience i hve used both spectrums mh and hps in veg and flower at the same time with great results bottom line do what you think is best but think of evolution plants trigger them selfs for millions of years to flower by sun phases so in reality hps for flowering is scientifically proven to be the best meaning it gives off more of the spectrum plants need in this phase pretty much same color spectrum as sun phases into autumnal equinox the sun is lower thus creating the spectrum the plants need
yerboyblue
Member
I spent HOURS looking at this subject the other night. The HPS seems to produce more weight and the MH made it more resinous, but growshopfrank seems to have a solid statement that it may LOOK more resinous (Im assuming because spectrum and such apparent to the eye). The reptiglo bulbs don't put out a lot of UVB to produce more trichs, although some who actually tried it said it does. The UVA of the reptiglos is supposed to make it smell better and taste better because of terpines and flavinoids. I will try adding these bulbs next time, smell and taste is everything out here.
We really need more side by side experiments on light spectrums on here.
We really need more side by side experiments on light spectrums on here.
thanks funtimesindeed,
the results really took me by surprise,
40% more on the Mh side on the same plant is staggering imo.
kinda makes me rethink what Ive taken for granted that HPS is thee best way to go in bloom,
the results with this plant seems to have shown the opposite.
and seeing vape13s results reinforce even more.
drshio had a very good post early in this thread that made me think even more about the standing hps-mh views.
I still believe genetics control things, and as said in this thread some plants have not done well with Mh in bloom.
so I'm not saying Mh does better all the time, but finding plants that excel under Mh is a plus in your corner.
money saved on bulbs is a big plus, vape13 uses $21 1000w Mh bulbs and look at his results.
bottom line to take from this thread imo?
for me its well worth it experiementing more with mh in bloom after seeing my and others results
FunTimesIndeed
Member
Yessir, Mr. Gnome. I won't be posting anything quantifiable, but I will gladly report back after being lured in by what I've seen thus far.
by all means keep us in the loop when you get to that point
the test results are in on potentcy for the plant in question.
taste and potentcy is the same for the HPS side and the Mh side, which i pretty much thought it would be but that would have been.
BUT
that raises even more Qs about how using Mh makes for a more resinous budz....
once again my understanding is using Mh increases resin but that doesn't seem to be in this case?
everything seems to be exactly the opposite form what ive read
HPS makes for denser buds,
BUT
Mh won that one in this case
as for HPS makes for bigger/more wieghty budz
which didn't happen, the Mh side produced bigger, denser, and more wieght by 40%
and Mh in bloom is suppose to make for more resinous budz but after a 80 days neither side seemed more potent than the other
more testing...more testing
T
TribalSeeds
Sorry, I havent read the whole thread, but this is a small space were talking about. Your "MH Side" was actually getting a lot of HPS light too... I dont see how this is even close to enough reason for someone to think about ditching HPS. Perhaps it was the combination of things including the light and dominant shoots, etc, etc.
That being said, I have been too high to replace my last MH conversion bulb in my flower and notice no difference at all going into week 4
That being said, I have been too high to replace my last MH conversion bulb in my flower and notice no difference at all going into week 4
Interesting thread...can't say Im sold either way but now want to give it a go anyway...We had in the past used a 1K-superMH open in the middle...surrounded by either 600s or 1ks...but we hardly ever mono crop so when you see another with great results its hard to buy into it unless you see it with multiple varieties under the same situation..
But Im def a student of the plant and seems its still teaching us things...well done all round gentz...
FOE20
But Im def a student of the plant and seems its still teaching us things...well done all round gentz...
FOE20
Attachments
I wish this were true ...
But it's not .
I used to buy those monster Sylvania MH at 1000 bulbs .
while they do rock it for vegging they just dont compare to the
higher output of a late model hps that has been built specifically
for plant growth .
The Ushio Hi Lux Gro for example is one that has enhanced blue
spectrum with it creating a perfect blend and maintains the BIG
power output of a hps ,a MH just doesn't stack up to it.
Then you have the added heat of MH bulbs,,,damn do they create it .
I dont want a light spectrum in flower that is going to contribute
to more leafy vegetative foliage and thats what MH are for ,
vegetative growth.
I know this is also strain specific but it does influence Indica
varieties and their hybrids which are the vast majority today
being grown .
Flowers grow to their peak potential when blasted with all the
energy you can toss at em,,,and HPS is the top dog in that dept..
Look to specialty HPS Bulbs ....Ushio is a top choice....
But it's not .
I used to buy those monster Sylvania MH at 1000 bulbs .
while they do rock it for vegging they just dont compare to the
higher output of a late model hps that has been built specifically
for plant growth .
The Ushio Hi Lux Gro for example is one that has enhanced blue
spectrum with it creating a perfect blend and maintains the BIG
power output of a hps ,a MH just doesn't stack up to it.
Then you have the added heat of MH bulbs,,,damn do they create it .
I dont want a light spectrum in flower that is going to contribute
to more leafy vegetative foliage and thats what MH are for ,
vegetative growth.
I know this is also strain specific but it does influence Indica
varieties and their hybrids which are the vast majority today
being grown .
Flowers grow to their peak potential when blasted with all the
energy you can toss at em,,,and HPS is the top dog in that dept..
Look to specialty HPS Bulbs ....Ushio is a top choice....
SunSimulator
Member
I stay RED but i hear a blue thrown in helps also !
yerboyblue
Member
I have used mixed and some of the above posts have mentioned MH produces more leafy growth We can sit here all day and here some cracker say they got better yields or more resin compared to HPS
But in reality 95 percent of growers never even come close to actual strain potential
You get some guy that grows some strain 3 times and thinks they know or there some guru and can actually say they see a difference when i can guarntee some time throughout there grow they either burnt,or had some kind of def or problem
And that is the problem this day in age way to many strains hell just look in some threads and see growers having 3 different strains going or finish some strain and off to new strain
Just look how in depth it has gotten with light spectrums people even going to the extreme on saying UV lighting will increase resin production How ridiculious will it get before common sense prevails
bluntmassa
Member
its actually recomended in ed rosenthals book to use a
600w hps-600w mh- 600w hps on a 4x8 table but I think thats too much light myself maybe on a 4x12 table mostly cause pulling 1gpw seems like it would be a bit harder to do with 3 600's on a 4x8 table thats 1,800 grams so about 4 lbs.
but I got a 4x8 table with 2 600's thier switchable so I think I'm going to buy a mh just to see which 4x4 area does best if the mh side does best then I will put 2 mh in to see if it does better or worse then my last over all yield with a mix
You probably be better off running 3 lights and placing the middle on as MH and vertical so it would blend in
I've read you should use a 7,000K MH to veg, HPS to flower(2100K?) and 10,000K MH to ripen the last two weeks of flower... Anybody do that? I think most people don't want to go through the work/risk of changing bulbs at various stages of plant growth? I've just been using floro's to veg/clone/seed and HPS to late veg all the way through ripening??? I'm thinking about picking up a 10,000K MH for my 600w Galaxy to both veg and ripen with though???
dont know, testing it out now, 600w horizontal and a 400w mh vertical.
some leaves are about an inch from the bottom of the 400w.
the growth allready looks bit "nicer" (healthier.) after only a day. greener too.
but potency and budsize, dunno..
buds look different under an mh, but i havent made enough comparisons to say if the budsize is much different, ive gotten pretty nice buds from an mh.
yes, they get leafier.
which depends on the strain, whether or not is an advantage or not.
so far i like using both. there are some characteristics of an hps grow that i do like.
but ive always been drawn to using both and when ive done so, well, side from everything looking nicer, leaves and everything, there is something quite spectacular seeing the colors of hps and mh combined, though, it looked the most sunlike when i added some t5´s 3000k to the mix, looked like the sun in the tropics. (looking at the plants in that combination of light.)
dont have the space for t5 now though.
some leaves are about an inch from the bottom of the 400w.
the growth allready looks bit "nicer" (healthier.) after only a day. greener too.
but potency and budsize, dunno..
buds look different under an mh, but i havent made enough comparisons to say if the budsize is much different, ive gotten pretty nice buds from an mh.
yes, they get leafier.
which depends on the strain, whether or not is an advantage or not.
so far i like using both. there are some characteristics of an hps grow that i do like.
but ive always been drawn to using both and when ive done so, well, side from everything looking nicer, leaves and everything, there is something quite spectacular seeing the colors of hps and mh combined, though, it looked the most sunlike when i added some t5´s 3000k to the mix, looked like the sun in the tropics. (looking at the plants in that combination of light.)
dont have the space for t5 now though.
I would like to try a 10k bulb. These are for reef Corals. I use 2 250w 10K on my tank..
USHIO Aqualite metal halide lamps feature the combination of color balance, color rendering and light output for healthy marine aquarium and reef system lighting. The USHIO BLV factory in Germany, collaborated with leading marine biologists to develop the first 10,000K metal halide lamps.
The Aqualite 10,000K lamps have a high color temperature from a single point source which simulates the appearance of sunlight near the equator in ocean depths of approximately 5 meters. The superior spectral balance of the Aqualite lamps are ideal for lighting and environmental conditions for reef systems. This includes fish, coral, invertebrates, marine fauna and flora
USHIO Aqualite metal halide lamps feature the combination of color balance, color rendering and light output for healthy marine aquarium and reef system lighting. The USHIO BLV factory in Germany, collaborated with leading marine biologists to develop the first 10,000K metal halide lamps.
The Aqualite 10,000K lamps have a high color temperature from a single point source which simulates the appearance of sunlight near the equator in ocean depths of approximately 5 meters. The superior spectral balance of the Aqualite lamps are ideal for lighting and environmental conditions for reef systems. This includes fish, coral, invertebrates, marine fauna and flora
