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MH vs HPS in bloom

vapedg13

Member
Veteran
Honestly I am a fan of MH/HPS flowering but I just got a 1000 HPS and will be using it veg to bloom. From my experience and research nothing really beats intense HPS light for big potent buds.


hps causes the nodes to grow further apart... you get more stretch

all mh in the 4000k range through the entire grow is the way to roll....add some lizzard lights to increase trichs :)
 

the gnome

Active member
Veteran
hey colorado

using Mh and HPS in the grow together is a plus
imo/ime you will benefit from the combo=
 

ellinho

Active member
I'm in the middle of harvest and just realized something about my Block Head strain.
in seed and 1st clone run the yield was poor, but very frosty and a keeper but for the weight issue. i ran it again last run to give it one more try, but i let my clones go already.
this last run the cola's were nothing like the 1st 2 runs?
nite and day difference and ive been beating my brains why this last round i'm getting arm length, beer bottle girthed cola's??
the seed run was hps in bloom, the 1st clone run was under 1 MH and 1 hps and the BH was under the HPS side of the grow pretty far from the Mh side.

my 3rd run with it, this one right now and i ran all Mh .
this is the only difference from the 1st 2 runs
View Image
;
View Image

these are from the all MH run,
same strain
same pheno

here is the cloned pheno from the hps mh grow in last run,
this is the top of the plant
View Image


this pheno under hps there was less leaf as the Mh one above but after the
trim yesterday they still beat the HPS bud in size by quite a bit

these were grown using only MH? I can see why you really should mix an HPS in there. these buds look just terrible imho ... must be a pain in the ass to trim that ... If you want leafs adding to your weight ok, I will go for lesser yield but more calyxes ...

so what do you think using 400W MH + HPS side by side should I switch plants around every 7 days or so that they get an even distribution from MH and HPS?
 

nephrosis

Active member
did you see at the bottom where it says "this pheno under hps there was less leaf as the Mh one above but after the
trim yesterday they still beat the HPS bud in size by quite a bit"

bud size... maybe alittle more leave but still bigger bud size.. i will agree with this 100%. yes i agree in mh and hps but if i had to choose between one, enhanced spectrum mh bulb all day! look at my 7200k mh grow!! im growing 4 diff strains under 1 mh light and they are ALL loving it except 1 pheno, and its the sativa.... hes just alittle stumpy but still budding great!


HPS should be used as side lighting/heating.... use a HPS in cold weather to allow more heat and humidity.

this is just me tho
 

ellinho

Active member
did you see at the bottom where it says "this pheno under hps there was less leaf as the Mh one above but after the
trim yesterday they still beat the HPS bud in size by quite a bit"

bud size... maybe alittle more leave but still bigger bud size.. i will agree with this 100%. yes i agree in mh and hps but if i had to choose between one, enhanced spectrum mh bulb all day! look at my 7200k mh grow!! im growing 4 diff strains under 1 mh light and they are ALL loving it except 1 pheno, and its the sativa.... hes just alittle stumpy but still budding great!


HPS should be used as side lighting/heating.... use a HPS in cold weather to allow more heat and humidity.

this is just me tho

yes I have seen his quote. if he is like a super trimmer and got every last leaf and the buds under MH would still be bigger ... touché... but you and I know that these sugary leafes can grow deep into the bud structure, not reachable for trim.
still I am not looking to get more of these leafes, I am most happy with buds I dont see any leafes in.

if you have access to enhanced spectrum lighting, good for you. trust me, I can totally see MH working. but if you only have access to classic spectrum MH and HPS nobody should be advised to only use MH ... I guess in that case you would still get best results from HPS only or even better with HPS/MH mix.

peace :)
 

vapedg13

Member
Veteran
all mh for years....:) the amount of leaf your plant produces is strain/genetic related

IMG_2220.jpg


IMG_2085.jpg


003-35.jpg



just as the amount of crystall is strain related

008-14.jpg
 

DrFever

Active member
Veteran
So this thread is Mh is better for flower HPS is better for flower from some test runs which can it be
as for me i will take HPS and lots of power in flower over mh any day of the week
some will say well i ran mh and got better resin production lol , i think most resin production is strain related that is why you see so many with different THC percentages

And for the ones that mention they got better yields with MH all i can say is you fluked it off .
For once your soil , nutrients everything did well. Cause i can guarntee you no matter if your a noob or vet grower there is always a few plants that just fck up i mean problems occur and it is just that one time where soil, nutrients, everything fell into sink and went well for you so now you think MH is the answer
You walk into a hydroponic shop and ask which is the best light for flower there answer will be HPS , you contact hordilux, phillips any brand maker of these bulbs and they will tell you HPS and you think these companies that spend millions upon millions of dollars on research are idiots ?? let me remind you there psysics in science you name it obviously knowing there shit i would say allot more then the average stoner
And now with mickey mouse growers questioning that mh will out do hps in flower i just don;t get it lol
will MH work in flower off course it will, will hps work in flower of course it will
which is better again with science behind everything HPS wins hands down its designed to give the lighting that imitates fall sun conditions
go put on some shades and look at our mighty sun does it give odd blue and white as you look at it no its yellow
you can have a room light like a nuclear explosion if its not the proper lighting for a plant its going to do fck all for it
 

vapedg13

Member
Veteran
So this thread is Mh is better for flower HPS is better for flower from some test runs which can it be
as for me i will take HPS and lots of power in flower over mh any day of the week
some will say well i ran mh and got better resin production lol , i think most resin production is strain related that is why you see so many with different THC percentages

And for the ones that mention they got better yields with MH all i can say is you fluked it off .
For once your soil , nutrients everything did well. Cause i can guarntee you no matter if your a noob or vet grower there is always a few plants that just fck up i mean problems occur and it is just that one time where soil, nutrients, everything fell into sink and went well for you so now you think MH is the answer
You walk into a hydroponic shop and ask which is the best light for flower there answer will be HPS , you contact hordilux, phillips any brand maker of these bulbs and they will tell you HPS and you think these companies that spend millions upon millions of dollars on research are idiots ?? let me remind you there psysics in science you name it obviously knowing there shit i would say allot more then the average stoner
And now with mickey mouse growers questioning that mh will out do hps in flower i just don;t get it lol
will MH work in flower off course it will, will hps work in flower of course it will
which is better again with science behind everything HPS wins hands down its designed to give the lighting that imitates fall sun conditions
go put on some shades and look at our mighty sun does it give odd blue and white as you look at it no its yellow
you can have a room light like a nuclear explosion if its not the proper lighting for a plant its going to do fck all for it


shit mh is the shit...been growin 20 yrs tried all combos...If you just listen to what a grow shop dude says.. youll never know...experiment see for yourself:)

IMG_1716-1.jpg
 

sLai*kRoLa

Member
DrFever, vapedg13 doesn't look like mickey mouse grower for me.

And about "fall sun imitation", in tropics there's no fall right? And where i live fall sun is much too weak for good bud... So... All this "hps imitates fall sun and that's why it's best for flowering" is mickey mouse lore IMO.

MH evolves, just like LEDs do, so let's stop aggressivly defend traditions, m'kay?
 

nephrosis

Active member
DrFever, vapedg13 doesn't look like mickey mouse grower for me.

And about "fall sun imitation", in tropics there's no fall right? And where i live fall sun is much too weak for good bud... So... All this "hps imitates fall sun and that's why it's best for flowering" is mickey mouse lore IMO.

MH evolves, just like LEDs do, so let's stop aggressivly defend traditions, m'kay?

Agreed....
 

DrFever

Active member
Veteran
Again we can sit here all day bickering over which is better Vap nice grow you got there bottom line HPS will walk mh in flower more denser buds better quality that is what is all comes down to right in the end ???? we can sit here all day posting rooms hell here 4 different rooms 72 plants in each room different stages 4 k each and another room scrog
 

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nephrosis

Active member
Again we can sit here all day bickering over which is better Vap nice grow you got there bottom line HPS will walk mh in flower more denser buds better quality that is what is all comes down to right in the end ???? we can sit here all day posting rooms hell here 4 different rooms 72 plants in each room different stages 4 k each and another room scrog


damn dude.... heres my take on it (from my first 2 grows)

I did my first grow without topping them and i used the hps, i didnt get many buds but i didnt have the room i have now. i totaly get what your saying.

Now that i topped my plants and only using mh, it seems like mh is better only because i dont have a exact side grow with the same strains....

BUT WHAT I cant tell you is i think, THINK, MH / hps might be strain related too.... iv noticed 2 phenos of this trainwreck i have and this 1 pheno i have is fucking LOVING the mh!! the way the buds are forming, it almost looks like ONLY the buds are getting bigger while there are way less leaves. the other pheno is way bushier and shorter with more buds but less weight.

These purple kushes im growing seem to love the mh while my blueberry kushes are licking it just a tad less... the buds are slightly bigger on my purple kush atm while the blueberry is more leafy.

I honestly think if you were to just mix them it would work best... just match the light your plant needs with mh/hps/t5 or even led lighting and i think any and all plants will flower great.

I cant tell you if mh is better or if hps is better, but what i can tell you is that plants love light :D
 

DrFever

Active member
Veteran
HID lighting is the most efficient way to convert electricity into light that is available to the consumer. There are two types of HID grow lights used for horticultural lighting:

HID Light Efficiency

Metal Halide - MH

Metal halide bulbs produce an abundance of light in the blue spectrum. This color of light promotes cannabis plant growth and is excellent for green leafy growth and keeping cannabis plants compact. It is the best type of light to be used as a primary light source (if no or little natural sunlight is available). The average lifespan is about 10,000 cumulative hours. The bulb will light up beyond this time but due to the gradual decline of light, it is not worth your while to wait for the bulb to finally burn out. If you compare their lumen (brightness) per unit of energy consumed, metal halides produce up to 125 lumens per watt compared to 39 lumens per watt with fluorescent lights and 18 lumens per watt for standard incandescent bulbs.

High Pressure Sodium - HPS

High pressure sodium bulbs emit an orange-red glow. This band of light triggers hormones in cannabis plants to increase flowering/budding in cannabis plants. They are the best lights available for secondary or supplemental lighting (used in conjunction with natural sunlight). This is ideal for greenhouse growing applications.

Not only is this a great flowering light, it has two features that make it a more economical choice. Their average lifespan is twice that of metal halides, but after 18,000 hours of use, they will start to draw more electricity than their rated watts while gradually producing less light. HPS bulbs are very efficient. They produce up to 140 lumens per watt. Their disadvantage is they are deficient in the blue spectrum.

If a gardener were to start a young cannabis plant under a HPS bulb, she/he would see impressive vertical growth. In fact, probably too impressive. Most cannabis plants would grow up thin and lanky and in no time you will have to prune your cannabis plant back before it grows into the light fixture. The exception to this is using a HPS light in a greenhouse. Sunlight is high in the blue spectrum which would offset any stretching caused by HPS bulbs.

Common manufacturers of metal halide and high pressure (HP) sodium lights include Philips, General Electric, Iwasaki, Venture, and Osram/Sylvania. Many of the manufacturers buy and use the same components, often manufactured by competitors. Most often the bulbs have the exact same technical statistics.

lol we can sit here all day posting pics of buds nice buds there Vap here are some of mine under HPS one on 5 gallon pail and other here beside 600 ml can
either way to each there own as long as your happy with your results Right

Cheers doc
 

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nephrosis

Active member
Honestly, im leaning towards them being strain related... I have a purple kush that LOVES MH all day, and a trainwreck. but my blueberry sativas are way too leafy or im just trippin
 

FOE20

Parthenocarpe Diem
ICMag Donor
Veteran
vapedg13....Im sold...great work man....righteous indeed...

man Im not seeing a huge huge improvement but I'll def say the Indos seem to really be responding the best so far..but their also kept closer to the light over all...but its def adding some extra "umph"...I'll agree with tose who are saying that its both part enviro and genetic thats goving the user the expression showing...its a 50/50 with skill level and intuition playing big roles as well.....
Im runnin a duel arc HPS(dom)-1k and a basic 600hps now..next Im gana switch the hps out for a Super Blue(MH) 1k...
like this....
1 - standard Blue MH
2 - standard HPS
3 - Super Blue DualArc - MH
4 - Super Blue Dual Arc - HPS (loaded now)
5 - is the shit Im after...Super Blue MH
FOE20
 

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