What's new
  • As of today ICMag has his own Discord server. In this Discord server you can chat, talk with eachother, listen to music, share stories and pictures...and much more. Join now and let's grow together! Join ICMag Discord here! More details in this thread here: here.

Ceramic Metal Halide (CMH)

MPL

Member
I'm ready to order my lamp. Does anyone know if the adv. tech guys are in any over the holidays? If they're going to be out until after New Year's I'll hold off.
 

Laura Kush

Member
Simba, this is a real big problem for me. The hood is either too high and the plants stretch or the leaf fringes curl up from heat stress. I live in the desert BTW and yes I do have an oscillating fan. IM LITERLY PULLING MY HAIR OUT OVER THIS!!! ARGGGHHH!!!

I recently moved to the desert southwest and its making growing impossible.
Temps are always high even in the winter. I like how there are no insects and fungus/mold here but the air is so dry. Humidity is 10-20%.

I recently went to Sante Fe for a day. Watered them before I left. In less than 48 hours I come back to almost dead wilted plants. Its probably because of the container size being very small but I just can't judge how high to place the HID.

Temps are usually around 80 F in the grow room. This can't really be helped.
 
Last edited:
T

TheOneWill

Where can i get a good 250watt HPS light fixture with a remote ballast?
 

Anghellic

Member
Well I have decided to use a cool tube for my 250w setup. I know that it will be cutting out *some* of that extra spectrum, but to me, i doubt it will be enough to notice.
I should be able to get the light much closer to the plants vercus a hood. In a 2x2' a hood would just be too much of a hassle, plus I can put my filter inside the box, a big selling point. The loss of spectrum should be overcome with the ability to get the light much closer to the plants. Ill be sure to report back. Loads of help here.
 

Siddartha

Member
Thanks simba and Freezer!

The question is what kind of ballast and socket do I need for a 150 watt lamp? I think I need a pulse start MH ballast with a medium socket if I read correctly. Correct me if I'm wrong.

Thanks again!
 

FreezerBoy

Was blind but now IC Puckbunny in Training
Veteran
Siddartha said:
Thanks simba and Freezer!

The question is what kind of ballast and socket do I need for a 150 watt lamp? I think I need a pulse start MH ballast with a medium socket if I read correctly. Correct me if I'm wrong.

Thanks again!

http://advancedtechlighting.com/cdmrx7.htm

http://advancedtechlighting.com/cdmg12.htm

http://www.atlantalightbulbs.com/ecart/nw012104/71A5492-510D.htm

150 Bulbs are G12 and RX7 based so medium or mogol socket does you no good. Links above list the ballasts. I've never dealt with Atlanta Lighting, theirs was the lowest price in a quick Google search.

Some of them have an E afterwards. Does this mean Electronic (as opposed to magnetic) I don’t know.
 

simba

Sleeping Dragon
hmm open and carbon, you could go hood to fan to carbon filter (just make sure fan can handle heat) it would draw the air from the room via the hood (the Main heat source)

Nat, im sure they will.. its not even known in the lighting world.. but u can search philips cmh 600 1000 patents to verify they have it..

Laura, setup.. and dimensions.?? I dont know soil.. only Dro and coco
So we get an idea..
cause it sounds like the lamp is to big for the area..
(if you have to raise the CMH so high that u get stretch hmm) HPS would be way worse..
u do need to get ur humidity up though thats way to low and ur plant dont work then.. (at its bio level, IE stoma and sweating basicly)

ang, its not that i dont like cool tubes cause they cut output rather they have Chit Reflectors.. ya need a good reflector.. but you have small enough area u should be good..

sid,
do you allready have the lamp if not
i like the Ed17 protected if you can fit that size in ur grow(fit in 90% of mini grows)

ya u need a M142 M102 ballast ya the liink right above from Freezer is a good ballast
 
Last edited by a moderator:

Anghellic

Member
Thanks for reassuring me simba. Ill be sure to adapt a reflector onto an cool tube as best I can. You dont get this kind of personal help too often, thanks all.
 

Deft

Get two birds stoned at once
Veteran
Laura, try using the back of your hand the same way you would judge formula temp for a baby, put your hand where the canopy is and if it feels more than just warm its too close/hot. With ambient temps in the 80s you will have trouble unless you get a fan that dumps all the hot air somewhere else and draws in cooler air.

You may want to raise humidity, any evaporating water will raise humidity if its a sealed enclosure. I've gone on trips for 9 days or so and had plants looking fine when I got back but my temps aren't that high and humidity is usually 40-60% in summer and winter alike. If I am worried about not being able to water for a long time I get out these 3/4" cotton wicks I have and put one end deep in soil and the other in a gallon jug of water, tin foil or plastic over the exposed wick would probably not be a bad idea but I have never needed to do that.
 

simba

Sleeping Dragon
horizontal -

Vertical |

your horizontal when lying down in bed, and vertical when standing up..
 
T

TheOneWill

simba said:
horizontal -

Vertical |

your horizontal when lying down in bed, and vertical when standing up..

So what would be the difference in the bulbs?
One is made to project vertical and one is made to project horizontal?
Wouldn't it be the same bulb?
 

simba

Sleeping Dragon
theres physics (gravity, Electro mag fields) and Chemistry in play in regards to burning position IE hor or vert>> in the hps retros there is a Dif.. 250-400 (20-150 dont matter)
if you burn in wrong position life and color is affected.. shortened version..

if your like 90% of us you want horizontal..

This is horizonta setup .. but i been asked the temp Q's..
if this was HPS in exact same setup (IE if i switch out the cmh for hps) i couldnt do this..
DOnt try this at home.. Yes its warm but Not HOT well gets toasty
yes i am gripping the bulb..
cmhnothot.jpg
 
Last edited:

FreezerBoy

Was blind but now IC Puckbunny in Training
Veteran
I think MPL asked this some pages ago. Don't know if he got an answer...

A horizontal bulb throws light perpendicular to the base (kinda'). Straight ahead, parallel to the base, is a dark spot.

Does the vertical bulb do the same (as in good for stadium setups)? Or does it throw a vertical spot better suited to SOG/SCROG?
 

gramsci.antonio

Active member
Veteran
knna said:
400w CMH has lower efficiency than HPSs, so its a less profitable choice, IMHO. Of course, there is still the quality concern, but take into account that when using high wattage CMHs, there is a trade off between quality and quantity.

How can you say this?

I'm really intersted, because i arrived to opposite conclusion, using my high school physic background. I would really be glad to hear your opinion, later i'll post mine.
 
G

Guest

knna -

I think we touched on this topic a while back in another thread. I will not get into a pissing match as I have respect for everyone's opinions. However, there are great differences in the plants growth, flavour, potency and no loss in yeild. As a matter of fact yeild has been higher versus the amount of space used and size of the plant as the plants stay more compact and are able to support larger buds with the stronger stems and lack of elongated internode spaces. I find it hard to calculate on paper with photons and such. Have you ever heard of or seen how wonderful (although small) in quality and vigour the plants that well thought out flouro grows produce?

I have said it before; would you feed your plants just __ - P - K or N - __ - K.........? I think not, and the plants use much more of the sun's spectrum than any HPS replicates. Certain plant hormone and chemical productions are supported/stimulated by different parts of the spectrum that the HPS bulbs do not provide in the correct ratios or levels. I don't want to sound like I am on a rant. Check out the outdoor results people get versus indoor under HPS. I have been lurking around some sites for the discussion of indoor gardening (legal stuff like tomatoes and such) and these bulbs have hit that world too. They seem to get shorter, healthier, higher yeilding, better root growth and more flavourful plants.

I wish you peace and good growing and ask you to look at my gallery and tell me if the CMH is failing to support my grows.

Like I say, peace, happy holidays and Merry Christmas to all who celebrate!!!!
 
Top