MH vs HPS for yield?

[Drek]

Wow. One thing we do agree on!

Nasa's already been all over it.
http://hortsci.ashspublications.org/content/39/7/1617.full.pdf

(Don't forget to read the 'Results and Discussion' section boys and girls!)

Who woulda thunk? RGB(daylight), turns out to be the cat's meow for plant growth. That's the f****** weirdest thing I've ever heard? Jesus that's strange...goddamn.

I can't get over it. Wow? (ok, i'll stop now)

http://riftlabs.com/2010/09/how-rgb-light-works/

 

[Growcephus]

G'dammit....

Now y'all got me wantin' to try using my 600W Digilux MH to flower this grow.

/shakes fist

The company is marketing it as a 4000K color bulb, so fuggit, I'll give it a shot and see if there's any noticeable difference in tric production compared to my last grow. I'm not too concerned with quantity, because I grow for myself only, however, a more potent plant would be vehra, vehra, nice indeed.

 

[rives]

Still holding out till the LED's get better, I believe they are the future for creating perfect spectrum for plants.

Interestingly enough, over the last couple of years LED fixture development has swung from the earlier red-blue NASA model to full-spectrum lighting. In fact, the best ones are now pushing.....guesses? Warm white for flowering and cool white for vegging.

The simple fact is that we know very, very little about how plants operate (along with most other natural phenomena). New discoveries are taking place continually, and frequently turn "settled science" upside down - take for instance how green light went from being thought of as totally unused to the discovery that it is actually used very efficiently, but only after the red & blue hit saturation.

One thing that seems very obvious to me - it is pretty damn silly to think that plants evolved under full spectrum lighting for millions of years, and somehow only picked out two very, very narrow bandwidths to use.

 

[blissfest]

Interestingly enough, over the last couple of years LED fixture development has swung from the earlier red-blue NASA model to full-spectrum lighting. In fact, the best ones are now pushing.....guesses? Warm white for flowering and cool white for vegging.

The simple fact is that we know very, very little about how plants operate (along with most other natural phenomena). New discoveries are taking place continually, and frequently turn "settled science" upside down - take for instance how green light went from being thought of as totally unused to the discovery that it is actually used very efficiently, but only after the red & blue hit saturation.

One thing that seems very obvious to me - it is pretty damn silly to think that plants evolved under full spectrum lighting for millions of years, and somehow only picked out two very, very narrow bandwidths to use.

Yep, warm white rocks in flower. Came close to buying LED's last year but was told to wait because they still are improving and becoming less expensive. Maybe another 2-3 years??

I was due for getting new bulbs and went with Ushio's Opti-Red this round. I change bulbs every 6-8 months so what the hell I will see what they got.

 

[rives]

Yep, warm white rocks in flower. Came close to buying LED's last year but was told to wait because they still are improving and becoming less expensive. Maybe another 2-3 years??

I was due for getting new bulbs and went with Ushio's Opti-Red this round. I change bulbs every 6-8 months so what the hell I will see what they got.

The cost is what got me going on the 315w CDM lamps. For about the price of putting warm white LEDs in my Hybrid fixture, I bought nine ballast/lamp combo's, 10 lamp sockets, and 3 hoods. I'm using less power, have higher quality and substantially higher yields.

Wait, weren't you the one that was arguing against CMH?

 

[Drek]

3,000 K Soft (or Warm) White compact fluorescent lamps
3,200 K Studio lamps, photofloods, etc.
3,350 K Studio "CP" light
4,100–4,150 K Moonlight[2]
5,000 K Horizon daylight

Anywhere in here...and you're fine for single bulb use. The rest is squibbling and squabbling(and genetics).
5k is kinda pushin' it imo, but it should be fine.

 

[acridlab]

acrid, did you use the 4k solis for your test? Was thinking about grabbing one due to vert requirement for Gnome's sylvania.

Yes, they are the solis teks, and that's exactly why I went for them,, from what I'm seeing, they are like strong ass cmh's.. they run a lil hotter than hps, but I truly think they're worth it. I used to be a huge horti fan, and to be completely honest, I do think there's alot of hype with em.. only lamps I've ever had fail on me, numerous times, actually..anyhow, I think you'll really dig the solis teks, bro..I was nervous at first, but I'm happy with em now for sure.. peace

 

[Catatafish]

Nice, thanks for the update. I will pick one up for a test run.

Ive been using horti's too. What i seemed to notice is the bud structure comes out alot different between different bulbs. I used to run 4x600s back in the day and used to play around a little mainly with sunmaster hps and hortis. 2 of sun in 2 hoods/1side, same for the hortis. Bud structure (same strain/pheno under each hood, whole room actually was so much different i didnt believe it at first and had to do it again (a couple times after too)to make sure. I liked the look of the horti buds better, the other difference were negligible (potency, yield, etc). I think the SM's used to stretch a little more too.

Its funny how the few threads of Gnome's i have followed so far seem to bring out the haters, Lol! Its like Gnome sprays his threads with "hater in heat urine" and they come running in droves. Good stuff Gnome!

 

[blissfest]

Nice, thanks for the update. I will pick one up for a test run.

Ive been using horti's too. What i seemed to notice is the bud structure comes out alot different between different bulbs. I used to run 4x600s back in the day and used to play around a little mainly with sunmaster hps and hortis. 2 of sun in 2 hoods/1side, same for the hortis. Bud structure (same strain/pheno under each hood, whole room actually was so much different i didnt believe it at first and had to do it again (a couple times after too)to make sure. I liked the look of the horti buds better, the other difference were negligible (potency, yield, etc). I think the SM's used to stretch a little more too.

Its funny how the few threads of Gnome's i have followed so far seem to bring out the haters, Lol! Its like Gnome sprays his threads with "hater in heat urine" and they come running in droves. Good stuff Gnome!

I don't think threads like this bring in "haters"? Everyone knows HPS kicks MH ass in yield, LOL!

There isn't a MH bulb that can out yield a Horti Super HPS.

A perfect test would be Phillips MasterColor 400 watt VS Horti Super HPS 400 watt. Same hood, tent, nutes, plants, ect.

I would bet none of these MH boys would put their hard earned money on the MH bulb winning this contest, and I would put a lot of money on the Horti HPS for an easy win.

 

[the gnome]

Its funny how the few threads of Gnome's i have followed so far seem to bring out the haters, Lol! Its like Gnome sprays his threads with "hater in heat urine" and they come running in droves. Good stuff Gnome!

the only real hater has been doc... errr I mean nurse hotflash.
but he's as impudent as they come because he can't prove anything for lack of real experience.
so he sends in his sock puppet that has no exp.with mh in bloom
so is equally as impudent and can't prove anything either

 

[blissfest]

the only real hater has been doc... errr I mean nurse hotflash.
but he's as impudent as they come because he can't prove anything for lack of real experience.
so he sends in his sock puppet that has no exp.with mh in bloom
so is equally as impudent and can't prove anything either

Would like to see you make your claims that MH is just as good as HPS on all the other weed sites, be interesting to see how it works out for you

Wonder if Jackmayoffer will switch too your $29 MH bulb in all his big commercial rooms? You should tell him he's doing it wrong

Why you're hell bent on this 15 year old debate is beyond me? Do a google search on MH vs HPS in flower and you will see where you stand in this Community, just saying

 

[rives]

Would like to see you make your claims that MH is just as good as HPS on all the other weed sites, be interesting to see how it works out for you

Wonder if Jackmayoffer will switch too your $29 MH bulb in all his big commercial rooms? You should tell him he's doing it wrong

Why you're hell bent on this 15 year old debate is beyond me? Do a google search on MH vs HPS in flower and you will see where you stand in this Community, just saying

Doc, I think that you and your alternate personality are the only ones telling people that they are doing it wrong - I've never seen Gnome try and convert anyone, he simply says what he is using and why.

Oh, and regarding your earlier post - if you'd like to swap that 400w MasterColour for a 315w Agro, I'd be happy to take that bet and spot you the additional 20%+ in power.

Run along now.

 

[Drek]

I doubt you'd see your money Rives, and if you came out ahead, I doubt they'd believe you anyway.

Thing is, in order to defeat these people, all you have to do is not care about yield. It's their only foothold. Once you take that away, they fall flat on their face! Doh!

 

[rives]

Even yield is arguable. I just weighed up my last run this morning - at 62%, I got 1.3 lbs from under (2) 315w 930's, and could have easily fit 4 more plants into the tent.

 

[blissfest]

Doc, I think that you and your alternate personality are the only ones telling people that they are doing it wrong - I've never seen Gnome try and convert anyone, he simply says what he is using and why.

Oh, and regarding your earlier post - if you'd like to swap that 400w MasterColour for a 315w Agro, I'd be happy to take that bet and spot you the additional 20%+ in power.

Run along now.

A 315w Agro will out yield a Horti 400 watt Super HPS???? C'mon Mannnnn, LOL!!! Why don't you guys believe the Red spectrum is what plants want in flower???? How much weed have you grown??

And I have no idea who Doc is, but obviously he knows more about growing weed than the MH guys here. Like I said, a simple google search will show where MH in flower stands. If MH was any good growers like Jackmayoffer and many many others here, at the farm, and all the other sites would be using them.

Some like the combo MH and HPS, but no one in their right mind says MH alone, except for a select few that overthink things.

I tried MH and HPS combo for about a year, and my yields went down, imo. Straight HPS wins in the flower room for yield.

I think the problem with you guys is paying your electric bill, you are grasping at whatever might keep your bill lower? Heat scares you too.

 

[blissfest]

I doubt you'd see your money Rives, and if you came out ahead, I doubt they'd believe you anyway.

Thing is, in order to defeat these people, all you have to do is not care about yield. It's their only foothold. Once you take that away, they fall flat on their face! Doh!

Read the "Title" of the thread, Doh!!!!

 

[meadowman]

i've been running conversion 600's for years. i like the finished product more so than the hps.

 

[rives]

A 315w Agro will out yield a Horti 400 watt Super HPS???? C'mon Mannnnn, LOL!!! Why don't you guys believe the Red spectrum is what plants want in flower???? How much weed have you grown??

Easily. If you could actually be bothered to do some real research, you would find that the 315 Agro puts out substantially more red than a HPS, which puts out yellow predominately.

Oh, and I've grown a bit. I started indoors well over 30 years ago.

 

[blissfest]

Even yield is arguable. I just weighed up my last run this morning - at 62%, I got 1.3 lbs from under (2) 315w 930's, and could have easily fit 4 more plants into the tent.

Should have used a HPS, that's pathetic. Less than a gram a watt.

HPS in the right hands can pull 2 grams a watt

 

[blissfest]

Easily. If you could actually be bothered to do some real research, you would find that the 315 Agro puts out substantially more red than a HPS, which puts out yellow predominately.

Oh, and I've grown a bit. I started indoors well over 30 years ago.

What is your excuse then? Less than a gram a watt?