Ceramic Metal Halide (CMH)

[MrShpongle]

Funny, cause I just saw that HTG setup 3 hours ago for the first time! I noticed that they are not selling the bulb separate from the package, which seems odd.

Onegreenday, where did you find the specs on the bulb? I've been looking at GE Lighting's website and can't find a bulb that corresponds to what HTG is offering.

 

[onegreenday]

http://genet.gelighting.com/LightProducts/Dispatcher?REQUEST=COMMERCIALSPECPAGE&PRODUCTCODE=93295

Funny, cause I just saw that HTG setup 3 hours ago for the first time! I noticed that they are not selling the bulb separate from the package, which seems odd.

Onegreenday, where did you find the specs on the bulb? I've been looking at GE Lighting's website and can't find a bulb that corresponds to what HTG is offering.

 

[tuinman]

Here are comparison links (PDF) to the GE and Phillips bulbs.

While digging around trying to see if GE made any 4K spectrum bulbs I found their HID catalog but wasn't having any success seeing if there was a 4K among the listed 400w bulbs.

 

[asde²]

It's time for me to replace my Philips CMH 150W bulb- Has anyone been able to compare the 3K and 4K bulbs. Is there a consensus as to which is better ?

usually the 4k bulbs got a higher output/watt (not lumen but watt[light]/watt[electricity]) but the 3k bulbs spd seems to be more attractive (in account with shinji tazawa's theories) for the grow rate - in the end it strongly depends on how much more light (in watt) the 4k version emit (varies depending on brand but my guesstimation is that ~10-20% more light is needed[do not compare lumen]) - but basically we can say that 3k versions are better.
/only counts for WHITE light cri over ~75. but thats what we get from actuall cmh lamps anyways..

 

[onegreenday]

do you feel like comparing the two and reporting back?

that would be sweet. I like the 4k for color;
they look so sweet

I'm dropping my 1k horty as soon as I build some parabolics;
then I use 4 -36" on a mover ; all 4k

or the 330 halide bulb;

soon, i hope..the resin is way better than hps horty;
way better; no comparison; a lot headier....

usually the 4k bulbs got a higher output/watt (not lumen but watt[light]/watt[electricity]) but the 3k bulbs spd seems to be more attractive (in account with shinji tazawa's theories) for the grow rate - in the end it strongly depends on how much more light (in watt) the 4k version emit (varies depending on brand but my guesstimation is that ~10-20% more light is needed[do not compare lumen]) - but basically we can say that 3k versions are better.
/only counts for WHITE light cri over ~75. but thats what we get from actuall cmh lamps anyways..

 

[Azeotrope]

Good timing I guess.... All of the dedicated CMHers on here know that I have been using the Philips 4k since months after their release years ago. I am still a believer! This round however I went with the GE 3k 250w on a mag core and coil ballast and a Philips 3k 150w on a Metrolight digital that I now know is running at 166hz square wave output.

Here are some pics of a 74 day 12/12 result of 4 Johnny Blaze X Sweet Blue (m). Their was one that could have gone another week but all in all I'm pleased. These were in organic compost/coco and fed with Aggrand until wk 2 of 12/12. Then they were on water for a while. The cab space is 30" wide and 22"deep. Roughly 5ft tall.

They still need more trimming but, I have an early day tomorrow so off to bed after this.

 

[Pinball Wizard]

Dual 400 CMH - 2x4 closet grows

Dual 400 CMH - 2x4 closet grows

Halloween & Valentine harvests

..

..

 

[Bobby Stainless]

Lookin good bud!

Nothing like a fresh CMH bulb.

 

[Azeotrope]

For those that are interested....... My observations witht the 3k versions I used, the calyx stacking was a bit 'harder' or tighter than this strain has produced. Trich density was excellent, odor very strong and overall health was good. It was 36 -38F a good number of the first 22 days of 12/12 during lights off and just in the 50sF with lights on. Very cold !!

Looking at the Philips 4k versus the GE 3k, my thoughts are too observe the area of that major spike on the charts. Both are way better than HPS and I think that spike in the yello/green area may be in just a tad better spot on the GE. Just observations. No two grows in the last few years have been the same medium, temps, clones and so on.....

Edit: IDK........ maybe not much difference there.... Those graphs are somewhat subjective and who knows, different plants respond differently to different environments and lighting. I'm sold on either the 3k or the 4k/3k combo.

 

[cannarelief]

WOW Pinball...beautiful!

 

[messn'n'gommin']

Halloween & Valentine harvests

..

..

They had a happy home!

 

[onegreenday]

that's some cold temp's zeo.
I had read that plants stop growing
when the soil is 50 degrees F;
did you observe that?
how did cold effect the growth/flower?

thanks.

For those that are interested....... My observations witht the 3k versions I used, the calyx stacking was a bit 'harder' or tighter than this strain has produced. Trich density was excellent, odor very strong and overall health was good. It was 36 -38F a good number of the first 22 days of 12/12 during lights off and just in the 50sF with lights on. Very cold !!

Looking at the Philips 4k versus the GE 3k, my thoughts are too observe the area of that major spike on the charts. Both are way better than HPS and I think that spike in the yello/green area may be in just a tad better spot on the GE. Just observations. No two grows in the last few years have been the same medium, temps, clones and so on.....

Edit: IDK........ maybe not much difference there.... Those graphs are somewhat subjective and who knows, different plants respond differently to different environments and lighting. I'm sold on either the 3k or the 4k/3k combo.

 

[Azeotrope]

They really slowed down. Some days you wonder if any growth ocurred. You can get some wierd looking - crinkled growth. Root temps averaged in the mid to high 40s F. Wasn't sure they'd make it through. Once it (soil) got above 55F and more towards 60F they took off again. I just couldn't heat the garage that much and these days, I tend to just let stuff happen.

Feeding with 80F water and the lights help load up the soil with a little heat. These were in a 33gallon plastic bin. Kind of a "bed" grow. They would have died in a single pot per plant grow.

 

[foescan]

I'm on my second run with a 250w CMH. I was planning on switching back to HPS for the last few weeks of flowering this round, although there's plenty of negative comments on HPS in this thread. Does anyone finish flowering with HPS?

 

[payn4school]

Well it would stand to reason that the redder spectrum of the hps would signal them them to finish faster, but thats just reason. others may say finish with mh cause the uv rays, but that seems pretty tarded.

So, Does any know if we can run a 600 hps and a 400 cmh on the same 1000W ballast!!!!??? This we be so fn sweet, its gotta be possible, probable//.....

 

[wmp]

What a monster thread, phew... :-D

I'm having problems figuring out whether the Philips Retro White CMHs would run on ballasts designed for both HPS and MH bulbs or do they require a HPS-only -ballast?

The ballast I'm looking at being APF Standard Series SAPIM 400.3 (specs)

If someone could clarify this, I'd be delighted.

 

[messn'n'gommin']

I think there are a couple of people here that use them. As long as it's a mag ballast, it should be ok on the hps setting.

 

[pinecone]

I'm having problems figuring out whether the Philips Retro White CMHs would run on ballasts designed for both HPS and MH bulbs or do they require a HPS-only -ballast?

The ballast I'm looking at being APF Standard Series SAPIM 400.3 (specs)

If someone could clarify this, I'd be delighted.

Not sure about that particular ballast, but I have been running the Phillips bulbs on a switchable ballast (HPS setting) without issue.

Pine

 

[wmp]

I think there are a couple of people here that use them. As long as it's a mag ballast, it should be ok on the hps setting.

Well that's the thing, both my ballasts (the aforementioned 400W and a 250W) run both MH and HPS, but have no switch for the mode. I guess they detect it somehow. Just wondering if this works with CMHs before I bother ordering bulbs.

 

[messn'n'gommin']

It says it is suitable for HPI Plus lamps, seems to operate at 50-60 hertz and has both a capacitor and an ignitor, a good sign. But, without knowing for sure, I hesitate to say one way or the other. You could contact the company and give them the specs for the CMH to get their take on it. But, I have no clue about European ballasts.