Bluegrassgrower
Well-Known Member
Anybody do it? positive results? I've heard it can frost them up nicely. Does it affect the buds in any negative way? Density etc?
Switching from hps to mh to finish?
- Thread starter Bluegrassgrower
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harris hawk
Well-Known Member
No; the difference is the light spectrum determins bud growth bud growth, different light spectrums are needed in the veg stage and flower stage,
Slipon
Well-Known Member
I read it myself, and it do kind a make sense, now I grow with LEDs and have a more complete spectrum, but if I still grew with my 600W HPS and had a MH as well I would maybe try it myself, also at the first few weeks of 12/12 (the stretch) it could make sense, and then run the HPS in the middle where your plants grow them Bud`s, last week your Bud`s wont grow much more anyway, just mature and the more blue spectrum is actually more similar to the light of late fall (and early spring) could also turn it down to 10/14 last week to simulate the end
Bluegrassgrower
Well-Known Member
I'm aware of the different spectrums for flowering and vegetative, I'm referring to the uv rays. I've read that mh emits more uv and more uv is said to cause more trich production since its also believed that trichs are used to protect the plant like sunscreen. I'm considering switching my hps out for a mh for the last 2 weeks or so of flowering. The buds are currently pretty much done growing. Large and solid as a rock and frosty as well, I'm just always up for improving my meds lol. Im just curious about anyone else's results.
Slipon
Well-Known Member
well, best way to find out is to try for yourself and see, that is atleast my experience after all the time spend in here
and yea I belive the MH will emit more UV-B and as you said, your Bud`s all done, just maturing, so don't think it could hurt, maybe just make em more potent
EDIT: I wouldn't run out and buy a MH set up for it though, so unless you have a degi ballast and both bulb I wouldn't go "overboard" tho then I might go for a new small 250W MH to add to the 600W instead, but that is of course a choice and a question of money and space and if you can keep the temperatures aso
and yea I belive the MH will emit more UV-B and as you said, your Bud`s all done, just maturing, so don't think it could hurt, maybe just make em more potent
EDIT: I wouldn't run out and buy a MH set up for it though, so unless you have a degi ballast and both bulb I wouldn't go "overboard" tho then I might go for a new small 250W MH to add to the 600W instead, but that is of course a choice and a question of money and space and if you can keep the temperatures aso
bird mcbride
Well-Known Member
If you want to do something positive put the hps and the mh on them That's if your grow op will allow this. If your gonna buy a metal halide get a ceramic mh. I use mercury vapour metal halide (a frosted mh) and four foot daylight t5's on my moms and any rooted clones that have to stay in the veg room. The biggest cola buds (nubs) I've ever grown was with two 1k frosted metal hallides plus 1k of holegen. 10-33g nubs that stacked up like corn cobs. Now it's 1k of hps and 300+w's of 4' t5 daylight tube on a 3'x3' flood and drain table which doesn't produce huge nubs like 3000w's but it does me good
Dr Gruber
Well-Known Member
I use both HPS and MH for flower the whole way through. I dont remember where i found it but i did read an article on the benefits of using both and there are a few threads where people use it very successfully.
Here is one of them......https://www.thcfarmer.com/community/threads/dankworths-tiny-head.48795/
Here is one of them......https://www.thcfarmer.com/community/threads/dankworths-tiny-head.48795/
Lo Budget
Well-Known Member
Yeah, I would use HPS & supplement with MH if I could. I only have one rig so it's one or the other. I left the MH in for two weeks after I flipped but it's all HPS now. I think full or mixed spectrum weighted to blue/red depending on veg or flower would give the best results.
kinddiesel
Well-Known Member
as soon as you start your flush you turn that mh on not using the hps any more. it does make the quality of the bud better. more frost. and some people say the buzz is a lot better .
DemonTrich
Well-Known Member
maby ill give this a shot this cycle. ive got a spare MH and HPS bulbs laying around anyways. might even be able to turn the A/C off with the MH bulb.
VTMi'kmaq
Well-Known Member
Cant believe I hadn't found this sooner, I always grow with 6000k t-5 blue spectrums (200 watts worth btw)in conjunction with my 600w hps koooltube mainly during weeks 1-4 of flowering then just hps to week 7 back to the t-5's on till harvest. I have convinced myself its a bonus in potency,terpene profiles, and of course colors!
strain horder
Active Member
U will actually get some UV-B from MH. UV-B radiatoin has a positive effect on THC production. The more UV-B radiation the higher the THC. HPS has no UV-B so MH would potentially provide a benefit. Now, unless you are using open hood reflectors, the point is moot. The UV-B in MH lights will be lost as light passes through the glass of an air cooled reflector. So if you are using air cooled hoods, it won't do anything to give you a THC boost regardless of the bulb.. U can go to a pet store and get a few UV-B bulbs (reptile lights). I've used them in small grows for the last 2-3 weeks of flower in the past with positive results. They are low wattage, cheap and don't create much heat. They also have a very limited effective range. So if you are in a 4x4 or so, I woulld put one in each corner for the last 2 weeks if you want to experiment.
I quit using my MH set-up altogether because metal halide bulbs are so much hotter than the sodium bulbs. If over-heating or under-cooling is a problem I suggest you try and keep the sodiums. Ideally, the books say use MH for vegging and HPS for flowering. Now that I'm vegging with the HPS set-up I am seeing slightly smaller stem widths during veg. It is a good tradeoff for me -- less heat and shorter plants. BigSteve.
strain horder
Active Member
To bigsteve's point.. Heat is always a trade off. As bigsteve says, you can veg with HPS. I also do this from time to time. What I have found is that the SuperHPS bulbs from Hortilux work well in veg. They supposedly have 25% more blue spectrum than other HPS bulbs. They definetly don't look quite as red as a Ushio or Lumatek HPS bulb. Heat is always something that needs to be considered... good point...
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