What's new

Changing between HPS and MH during flower???

natrone23

Member
I got a 400mh and a 600 hps from my small anecdotal evidence I thought the buds under the 400mh were slightly smaller, I think more from the mh than from the extra 200w. but I do believe it does add more trichs if u use a mh in the last 2 weeks or so it seemed add more trichs in my experiments but maybe it could just look better with the blue light IDK.

I just got 2 new hps bulbs so I wont change back to mh/hps and i run a perpetual so i have different aged plants so it will be straight hps
 

motofox16

Member
Nice, glad to see this topic up.
I was actually reading a book of DJ shorts a bit ago that said he uses them for color ect. this is the first time I have ever heard of it, so its good to read all this about it. I was wondering, If i have a 2kw budding room, should i switch one to MH, I have a perpetual grow so i have 3 stages of budding under the same light. Thanks for the info!
 

zenoonez

Active member
Veteran
Nice, glad to see this topic up.
I was actually reading a book of DJ shorts a bit ago that said he uses them for color ect. this is the first time I have ever heard of it, so its good to read all this about it. I was wondering, If i have a 2kw budding room, should i switch one to MH, I have a perpetual grow so i have 3 stages of budding under the same light. Thanks for the info!

Which book? Link please? Been meaning to pick up some reading materials.
 

VerdantGreen

Genetics Facilitator
Boutique Breeder
Mentor
ICMag Donor
Veteran
thanks for all the responses and thanks for that article konstantgrdnr!

what i really want to know is if a plant can immediately utilize all the light from an abruptly changed spectrum (say from HPS to MH), or if it has to adjust to it slowly.

keep it coming folks. i'll post my observations on changing to CMH when the bulb arrives

V.
 

englishrick

Plumber/Builder
Mentor
ICMag Donor
Veteran
hay v

its like moving from season to season ,,,,if its fluid its fluid

in my experence,,,if you add MH in late flower it makes calax swell-up massive in a week,,,,but if you start to add blue and reducde the red spectrum, plants seems to re-veg,,,,,,[if you DID want to reveg!!, addin the MH in late flower would speed up your reveg],,,,ya know what im sayin v?,,,,,,,,,,imo plants have set modes,,,if you prepare for a mode the plants "seem" to respond quickly,,,,



i think MH on its own in late flower is heddin for re-veg..,,,but i can see benifits
 

Grizvok

Member
hay v

its like moving from season to season ,,,,if its fluid its fluid

in my experence,,,if you add MH in late flower it makes calax swell-up massive in a week,,,,but if you start to add blue and reducde the red spectrum, plants seems to re-veg,,,,,,[if you DID want to reveg!!, addin the MH in late flower would speed up your reveg],,,,ya know what im sayin v?,,,,,,,,,,imo plants have set modes,,,if you prepare for a mode the plants "seem" to respond quickly,,,,



i think MH on its own in late flower is heddin for re-veg..,,,but i can see benifits

Weren't you just telling us that a single "bulb" grow of MH vs a single HPS would result in the MH winning by a landslide?
 

odin_

Member
Weren't you just telling us that a single "bulb" grow of MH vs a single HPS would result in the MH winning by a landslide?

lol at that


also a plant isnt going to reveg, no matter what light its under, unless you change the light cycle
 

motofox16

Member
Which book? Link please? Been meaning to pick up some reading materials.


You know, i'm not sure which book as I was in a club waiting room just flipping around while I waited, but it was a book by DJ Short.

But I STRONGLYYY recommend UrbanGardenMagazine. Any question you can think of they have already gone through and analized it or had some specialist do a test on it. Its filled with so much information. even accessible full articles online urbangardenmagazine.com let me know what you think!
 

Thundurkel

Just Call me Urkle!!
Veteran
I'm fucking stoked about all this! I've known since I started growing that HPS didn't have a perfect spectrum and thats why my CFL buds have always been better quality than shit I've got from my friends who run HID and they a pro growers no shit bud but the CFL nugs are just more potent. I had always said it came down to my lights being a better spectrum closer to sunlight and it makes my plants produce more cannabinoids and terpins.

I'm even more excited that I was given a 10000K MH bulb with my HID system I got recently and though my HPS is only 2100K I'm going to hang some Y sockets with a 2700K and 6500K CFLs in them and then pop that 10000K bulb in for the last week and a half and I think I should have a better yield and better quality than if I just ran the HPS...
 

hilbie

Member
i fully agree to the point about plants need for blue light, an alot of times i get higher on mexican weed then hid hydro grown under hps bulbs, sure it lays u out but there no magic to the stone, its missing vibrations of light and it seems when u smoke erb like this u need to keep smoking n smoking it simply because of how dull it is. the best buds ive seen on the IC are cfl or floro in the bluespectrum grown-
 

VerdantGreen

Genetics Facilitator
Boutique Breeder
Mentor
ICMag Donor
Veteran
i've just changed my bulb to MH for the last 10 days flower on a
UK cheese, and i have a sativa in there with a couple weeks left. i'll let you know if there is any difference.

my CMH hasnt arrived yet :(
 
F

flat5th

Just chiming in with my experience:

I've grown for almost 2 years now with 2 400w HPS. This time around i added a 250w MH between the 2 HPS and the results are stunning! The calyxes are swollen and totally frosty. They are so sticky and smell sooo sweet.

I have another 400w HPS and another 250w MH. i'm thinking about doing the 3 400w with a 250w between each. should make for a sexy show.

Thanks!
Fifth, the anecdotal grower.
 

Thundurkel

Just Call me Urkle!!
Veteran
Good to know flat5th I'll be switching over to my 10000K MH for the last 2 weeks for sure and I'm going to get a PlantMax 400w HPS bulb with added violet and blue which should help out more than the regular ol HPS bulb I have now...
 

Thundurkel

Just Call me Urkle!!
Veteran
What I want to know is when can I run a CMH on a digital 400w ballast the shit makes no sense to me that they work on HPS ballast's being a MH and yet they don't work on ballast's that are for HPS/MH WTF!!!! Anyone else waiting for this to happen or have any info on the subject? I think a CMH bulb is the way to go over a HPS what do you all think?
 
V

vonforne

thanks for all the responses and thanks for that article konstantgrdnr!

what i really want to know is if a plant can immediately utilize all the light from an abruptly changed spectrum (say from HPS to MH), or if it has to adjust to it slowly.

keep it coming folks. i'll post my observations on changing to CMH when the bulb arrives

V.

I came to that conclusion a few years ago. I then switched to Hortilux Super Eye.....I think that is correct It was and still is the best bulb I have every used. It has a balanced Spectrum.

In the EU I am using GIB lighting Super Spectrum think it does good but I would ike to get more balanced so I picked up a switchable ballast.

V
 
I

ijimunot

I just fired up a 1000 watt plantmax this week. Seen a good amount of flower growth so far. The 1000w is two lamps in one. 600w hps and 400w mh. Will wait until meds are dried to see if a $40 lamp outperforms the big boys. Peace
 
Top