Philips 315w CDM Elite (CMH)

[CHEFfy]

Got 3 t12 942 from HS. Just opened the boxes and double checked.

 

[Hammerhead]

I just checked the listing at HS it has been updated with the correct info. They also lowered the price to $64.73.. That the best price Around. I will prob order 1 at that price. I will have a lot of spares but thats OK. I might someday get a dimlux 630. I will have the bulbs for it if I do.

 

[Stinkhorn123]

I just wanted to say HS is the worst, they sent me the wrong shit and tried to get me on a restocking fee also. Not to mention my ordeal with them set me back two weeks.

 

[Jhhnn]

Poking around on the HS site, I found this totally mis-categorized lamp-

http://www.horticulturesource.com/g...color-cdm-lamp-315-w-argo-p-12-cs-t12-p13536/

I noticed the CDM-TP MW designation on the box, wondered what the "P" means. So I googled "cdm-tp mw" which led me to a family of CDM with double(?) quartz sleeves for reduced UV & less fading in shops & businesses. But that lamp isn't listed by Philips with the rest of the CDM-TP family-

http://www.lighting.philips.com/mai...ischarge/mastercolour-cdm/mastercolour-cdm-tp

Philips is strange. When HS mangles the information, it's even stranger.

 

[CHEFfy]

Got one of my phantoms up and running with a welthink ballast. So far, so good! At least no fires or anything yet. Will post pics tomorrowish.

 

[Avinash.miles]

bigups cheffy, glad u got one fired up....

 

[geo923007]

Rives sent me an email

 

[Hammerhead]

The Double sleeves are for open fixture use. They also have the same bulb with just 1 sleeve. those are for closed fixture use. Many vendors do not pass on this info. Lately I have been finding many that don't list if the bulbs are for open ir closed fixtures. Sure you can use either bulb in any fixture. If you put a single sleeve bulb in a open fixture and it has an extreme failure you could have a fire. This is very possible that's why Phillips made the bulbs with 2 sleeves. Looks like they already put the price back to 71.92.. I dont buy things from that site very ofetn. it has to be something I need and the price it the best I can find..

This is the bulb you need for a Open fixture t12 4200
http://www.horticulturesource.com/p...master-color-cdm-elite-mw-315-watt-t12-p22808

Here is the 942. I found them on Phillips site
http://www.usa.lighting.philips.com...m-t-elite-med-wattage/928601167102_NA/product

 

[Tactical Farmer]

I have 7 of the discontinued Philips 400w mastercolor cdm bulbs, how do they compare with the new 315w technology ?

 

[Avenger]

Poking around on the HS site, I found this totally mis-categorized lamp-

http://www.horticulturesource.com/g...color-cdm-lamp-315-w-argo-p-12-cs-t12-p13536/

I noticed the CDM-TP MW designation on the box, wondered what the "P" means. So I googled "cdm-tp mw" which led me to a family of CDM with double(?) quartz sleeves for reduced UV & less fading in shops & businesses. But that lamp isn't listed by Philips with the rest of the CDM-TP family-

http://www.lighting.philips.com/mai...ischarge/mastercolour-cdm/mastercolour-cdm-tp

Philips is strange. When HS mangles the information, it's even stranger.

The 'P' in Philips nomenclature means the arc tube is Protected. I believe they use it interchangeably with 'O' for Open rated.

If you go to this page:
http://www.lighting.philips.com/mai...colour-cdm-t-elite-mw/928601167131_EU/product

and scroll down to 'Product Data' you will see how Philips works hard to confuse you.

Full product name
MasterColor CDM-T Elite 315W/930 T12 U P 1CT

Order product name
Mastercolour CDM-TP Elite MW 315W/930

They put the 'P' in both versions of the name/nomenclature, just in different order.

I'll attach pics of a 942 and a 930 AGRO packaging, with 3 views and 3 diff versions of the nomenclature. lol

 

[Jhhnn]

Thanks for that, Avenger. It doesn't help that Philips publishes lamp order codes using neither "P" or "T" designations-

http://www.lighting.philips.com/us_en/connect/tools_literature/downloads/PLt-1414BN_v1.pdf

The full designation tells us if a lamp is protected 3 different ways, if I'm getting this right-

TP MW is protected while TMW is not. They also market smaller lamps designated as TP MW that have double inner quartz sleeves.

T12 is protected while T9 is not. That also refers to the slightly different lamp shapes & diameters, T12 larger to accommodate the inner quartz sleeve with a dimple(?) on the end & T9 smaller with a tit.

/O is protected while /E is not.

If they were trying to achieve clarity they went about it in a strange way.

 

[Hammerhead]

I believe the O= Open and the E= Enclosed...

 

[frostqueen]

Got one of my phantoms up and running with a welthink ballast. So far, so good! At least no fires or anything yet. Will post pics tomorrowish.

Nice! Can't wait to see one in action!

 

[beta]

.

 

[Hammerhead]

I keep mine pretty far. I'm not using any lens kit. I'm using a SS LEC 630 . I have it mounted up as high as I can get it in the veg tent. I'm getting better results than I did with the 600mh. All of the plants are super tight bushy plants. I have also noticed the plants don't dry out as fast. The room temp is cooler then it was using the 600mh.

These 2 plants will be going into flower tonight.

 

[rives]

I picked up the air-cooling kit (lens + ducting) for the Phantom hood - How close to the lens can I let my canopy get? It's my understanding that LECs need a bit more distance than their wattage would indicate, but I'm not sure if that was a product of increased PAR / lumen output or the general lack of air-cooled hoods.

I'd just figure out what the minimum distance is that you need to get the best light distribution and go with that. I've never had any issues with the plants getting too close, and I've had them nearly touching the glass when they got away from me.

 

[willowz]

Hi, newbie here...

I bought a 330w ballast that purportedly extends the lifespan of CMH bulbs by quite a bit. I was wondering if OC'ing a 315w Philips bulb would be a smart idea? The other philips bulbs suited for 330w have poorer specs than the 315w one.

Thanks.

 

[rives]

Hi, newbie here...

I bought a 330w ballast that purportedly extends the lifespan of CMH bulbs by quite a bit. I was wondering if OC'ing a 315w Philips bulb would be a smart idea? The other philips bulbs suited for 330w have poorer specs than the 315w one.

Thanks.

No, it would be a very poor idea.

The 315 lamp is uniquely designed to run at low frequency and virtually all of the other available electronic ballasts are high frequency. Also, CMH lamps run at extremely high internal pressures (2500-3000 psi) and can grenade in a spectacular fashion when they fail.

 

[Jhhnn]

I'd just figure out what the minimum distance is that you need to get the best light distribution and go with that. I've never had any issues with the plants getting too close, and I've had them nearly touching the glass when they got away from me.

The big energy spike of HPS out in the infrared just isn't there with CDM so the plants aren't being cooked nearly so much.

I think that plants absorb different wavelengths of light in different ways. Low frequency infrared is absorbed right at the surface, raising the temperature. Too close to the light & the plant tissues can't dissipate the heat fast enough to not be damaged. Shorter wavelength higher energy photons penetrate more deeply so the heating isn't as localized & the plant can deal with it better. Some pass right through the leaves whereas infrared doesn't.

Or so it seems to me.

I'm finishing my first grow w/ CDM & blumats together & I couldn't be more pleased. This is the second w/ blumats & Ace's soil mix so I knew what to expect from that. I have achieved what I wanted, which was greater efficiency w/ results similar to my previous 1000w system. I don't have the experience to say whether 630w of CDM grows better or worse than conventional 1000w systems, but it's in the ballpark, for sure. I save 460w/hr of operating expense & have an easier time dissipating the heat.

Being strictly non-commercial I want to hold down the overhead while having an ample supply for friends & family. It's just one old guy's hobby & he's having fun with it.

 

[Avinash.miles]

I've got my two 315w CHM in a 5'x10' tent, with a 600w hps inbetween them, that's going side by side a tent with a 1000w hps and a 1000w MH
will post pics here as time goes along, both tents are in week one right now...