What about CMH Bulbs? - GreenPassion.org - Dedicated to Medicinal Cannabis Cultivation and Education

4maggio · #1 (**permalink**) 05-16-2009, 12:56 PM

High all.. I now run 600HPS A>Z.. but the best yielding harvest was when I vegged for 3 weeks with a
Phillips 400W Ceramic Metal Halid..
and then went to 600HPS for the remainder of the run. It's supposed to be bluer??! a cooler white.. It is BRIGHT!
On the other hand the strain might have just been reaching maturity (3rd run) and it was coincidence.

Due to happenstance, I haven't used it since then (it must use a MECHANICAL.. 400w ballast.. the do make smaller watted CMHs)

Has anyone had any experiences with CMH..
I know there are opinions! Those too.

Richard Owl Mirror · #2 (**permalink**) 05-16-2009, 01:09 PM

I've never used one but, is this what you are refering to ?

Ceramic Arc

Ceramic Metal Halide Bulbs

Quote:

The basics first - NO DIGITAL BALLASTS (you will destroy the bulb)

chuckd420 · #3 (**permalink**) 05-16-2009, 03:41 PM

If it works like it says, that would be alot better than having a switchable ballast and hps and mh bulbs, and cheaper too.

4maggio · #4 (**permalink**) 05-16-2009, 06:32 PM

Quote:

Originally Posted by Richard Owl Mirror

I've never used one but, is this what you are refering to ?

Ceramic Arc

Ceramic Metal Halide Bulbs

Yes it is... ROM

4maggio · #5 (**permalink**) 05-16-2009, 06:36 PM

Quote:

Originally Posted by chuckd420

If it works like it says, that would be alot better than having a switchable ballast and hps and mh bulbs, and cheaper too.

With switchabel digi ballast, MH to HSP is much easier today than a few years ago but yes, going from CMH to HPS with the same MECHANICAL basllast. They won't spark up with the digi ballasts and the biggest the make is 400w.

I'm going to try using it with some AK47 I have that are one week old today... happy birthday .. LOL!! But I have no base line ATM.

4maggio · #6 (**permalink**) 06-16-2009, 07:16 PM

High everyone..

Well, I ran the last 3 weeks vegging 5, SS AK47, under 400w CMH.

Sex is 4 girls one boy.. clearly, in 35 days overall.. I changed the light to 17/7 (from 18/6) on day 28 and 12/12 on Day 32.

Additionally, there is a thread here some where (I've seen it elsewhere too) about the sex of a seed and the volcano in one end of each female seed..I can't find it now but I inspected these 5 seeds and I did identify 4 girls and 1 boy.. all correctly..
coincidence??? I don't know but I'll be checking from now on... but I remeber much skepticism.. I'm more convinced now.

Thats the wron picture on the right.. that's when they were babies.. I'll be back with the right one..

4maggio · #7 (**permalink**) 06-16-2009, 07:19 PM

There you go.. middle one in back is the boy

Lumix · #8 (**permalink**) 06-16-2009, 07:33 PM

Quote:

Originally Posted by 4maggio

High everyone..

Quote:

Originally Posted by 4maggio

Well, I ran the last 3 weeks vegging 5, SS AK47, under 400w CMH.

Sex is 4 girls one boy.. clearly, in 35 days overall.. I changed the light to 17/7 (from 18/6) on day 28 and 12/12 on Day 32.

Additionally, there is a thread here some where (I've seen it elsewhere too) about the sex of a seed and the volcano in one end of each female seed..I can't find it now but I inspected these 5 seeds and I did identify 4 girls and 1 boy.. all correctly..
coincidence??? I don't know but I'll be checking from now on... but I remeber much skepticism.. I'm more convinced now.

Thats the wron picture on the right.. that's when they were babies.. I'll be back with the right one..

Here's a thread I strated back April
Can you determine the sex of a cannabis seed?

I doubt this is true because you can do things to help increase the chance of a seed turning out female by introducing things like estrogen.

4maggio · #9 (**permalink**) 06-16-2009, 08:28 PM

Quote:

Originally Posted by Munchies

Here's a thread I strated back April
Can you determine the sex of a cannabis seed?

I doubt this is true because you can do things to help increase the chance of a seed turning out female by introducing things like estrogen.

High Munchies.. yes that's the one..
I didn't think anything of it.. but what the hell.. put'em under a microscope, jot dow your observations and wait. 5-5!

I just started som DRGT Original Cheese Feminized.. they all look like foot balls, no crater at all; point.

Why not track it a few goes? What could it hurt? Could be good.

Lumix · #10 (**permalink**) 06-16-2009, 08:33 PM

Quote:

Originally Posted by 4maggio

High Munchies.. yes that's the one..
I didn't think anything of it.. but what the hell.. put'em under a microscope, jot dow your observations and wait. 5-5!

I just started som DRGT Original Cheese Feminized.. they all look like foot balls, no crater at all; point.

Why not track it a few goes? What could it hurt? Could be good.

You could trail blaze for the rest of use in documenting the visual volcano and the final out come.
There are distinctive visual differences between human male and female why not the simple cannabis seed?

Lumix · #11 (**permalink**) 06-16-2009, 08:36 PM

O yea here's a wonderful read on CMH
Ceramic Metal Halide (CMH) - International Cannagraphic Magazine Forums

4maggio · #12 (**permalink**) 06-17-2009, 07:26 AM

Quote:

Originally Posted by Munchies

O yea here's a wonderful read on CMH
Ceramic Metal Halide (CMH) - International Cannagraphic Magazine Forums

High munchies.. thanks for this^^^.
I can't imagine how I missed a thread with this many posts..

4maggio · #13 (**permalink**) 06-17-2009, 08:01 AM

High everyone..

I have found that, since my first harvest, my abilities to to simple things, like add, subtract and set timer schedules has decreased.

It has expanded to seeing.. as reproted earlier I was 5 for 5 selecting sex from seed observation...
Well, today, I look again and the boy .. is definatly a girl .. and 2 of the girls (I thought) aren't showing at all. What a dick. LOL!!

But it still leeds me to ask: "what happened to the stretch?" They're only 7-8 inchs tall!
I better go back and look again! What a dick! LOL!!!

Lemon Stinky and NL99!

4maggio · #14 (**permalink**) 07-01-2009, 03:16 PM

High all.. here are those ak47s that were veged under 400w CMH..

They are at day 50 from seed...17days bloom, they are 20 inches tall except that bruser girl in the middle back.. she's 24 inches tall.. I think I'll scrog her and one of her little sisters next go..

Back on topic.. I'm thinking that they are small (short!) for girls that far into bloom.. stretch is over, for the most part.. can't wait.. 8 more weeks!

School is stil out on the CMH for veg.. or for a complete grow..

6951A · #15 (**permalink**) 07-01-2009, 04:42 PM

if you live in Western WA, you've probably dealt with HydroTech and their looney owner before. This guy is a CMH nut, pushes them onto everyone who comes into his place. A friend of mine tried running them. In veg they work fine. I would say they are inferior to MH but not by much. Flower is a totally different story. My friend, who is an experienced grower, never came close to matching what HPS could do using the CMH in flower.

And that hydrotech dude thinks they are the second coming, he actually told me to change out my 8 600s for 12 CMHs...ya thatd be money well spent.

4maggio · #16 (**permalink**) 07-01-2009, 04:53 PM

Quote:

Originally Posted by 6951A

if you live in Western WA, you've probably dealt with HydroTech and their looney owner before. This guy is a CMH nut, pushes them onto everyone who comes into his place. A friend of mine tried running them. In veg they work fine. I would say they are inferior to MH but not by much. Flower is a totally different story. My friend, who is an experienced grower, never came close to matching what HPS could do using the CMH in flower.

And that hydrotech dude thinks they are the second coming, he actually told me to change out my 8 600s for 12 CMHs...ya thatd be money well spent.

High 6951A < Your birthday!?.. differnt'..

You mention lack of yield.. some, yes I've read that, too.. but I remember reading that the farther blue (or some such technical verbage) will lead to richer tasting bud.. Unless someone tells me that they did it and lost 50% but it was goooood...I'll try it one day.. next year, probably.. have to establish a base line w hps, 3-4 grows. AK47 or OCF? I'll decide by christmas..

I will say that from what I've read about ak47 it is a medium sized plant..
IMO.. and what do I know.. 20 inches on day 50 overall these aks would be small..
If I'm off base.. or missing somethin, tell me and put me out of my delirum! LOL!!!!

LemonStinky

6951A · #17 (**permalink**) 07-01-2009, 05:00 PM

Quote:

Originally Posted by 4maggio

High 6951A < Your birthday!?.. differnt'..

You mention lack of yield.. some, yes I've read that, too.. but I remember reading that the farther blue (or some such technical verbage) will lead to richer tasting bud.. Unless someone tells me that they did it and lost 50% but it was goooood...I'll try it one day.. next year, probably.. have to establish a base line w hps, 3-4 grows. AK47 or OCF? I'll decide by christmas..

ya, I wouldn't buy that until I saw double blind taste tests. Every test I've done using blue light in flower has resulted in less bud, of equal quality.

Which makes sense since any given amount of wattage spent generating photons will generate more red photons than blue (blue light photons have more energy), plants see photons. And the red peak response seems to be ideal for flower to boot.

Now supplemental UVB, that's something I think is worth its wattage, but be careful.