Philips 315w CDM Elite (CMH)

[GET MO]

Anyone doing mass defoliation techniques using CHMs?

 

[IntotheGreen]

Thanks again rives! So as I set about looking for these various components of course I just come across this:

http://prospeclighting.com/Joomla_home/ballast-types/8-pro-spec-315w-horticultural-ballast

Philips 120v ballast in full enclosure!?! This must be new?? No pricing on website but has anyone seen this before?

 

[Slipnot]

Wondering if anyone has ran a side by side 300 watt cob vs 315 watt CMH which one would be more efficient, and which one would yield more.
Also which one covers a more area

 

[frostqueen]

Thanks again rives! So as I set about looking for these various components of course I just come across this:

http://prospeclighting.com/Joomla_home/ballast-types/8-pro-spec-315w-horticultural-ballast

Philips 120v ballast in full enclosure!?! This must be new?? No pricing on website but has anyone seen this before?

Interesting, but ouch on that price: https://www.amazon.com/SPEC-Watt-Remote-Grow-Ballast/dp/B01AZYDF48

 

[IntotheGreen]

True, I just got the bare 240v ballast for $145, but I'm probably gonna spend $100 extra in cords, tools, etc. setting it up anyway, plus a lot more time. If this Prospec is new technology, and being marketed to growers, I would anticipate the price coming down some over time, no?

 

[fieldgrower]

Figured ide share some pics of my blue dream im growing under a 315 w cmh. I must say im extremely impressed being just 2 weeks from harvest and i have some towers! Their starting to purple a bit and reek like a spicy blueberry smoothie

 

[willowz]

Just found this bulb. Rad spectrum:

http://growershouse.com/growers-choice-315w-10k-cmh-lec-lamp

 

[krunchbubble]

Next month Hortilux is coming out with a DE 630....

Just checked out the Air Cooled LEC 630, so heavy....

So New SS Vertizontal DE hood is badass...

 

[dbkick]

Next month Hortilux is coming out with a DE 630....

Just checked out the Air Cooled LEC 630, so heavy....

So New SS Vertizontal DE hood is badass...

I wouldn't count on hortilux coming out with anything since they've put off their white hps by possibly several more months.

 

[Cadfael]

Testing a sun system 315 CMH 3100K in veg.

Bought a 492 bulb (the 4200K bulb). Plugged it in and it didn't fire.

Is that because the bulb will only work with a 4200k Ballast? I thought that were compatible.

Thanks all.

 

[Hammerhead]

Bulb should fire spectrum won't matter.. You need to wait 15 min before the ballast will refire.

 

[GrowerGoneWild]

Figured ide share some pics of my blue dream im growing under a 315 w cmh. I must say im extremely impressed being just 2 weeks from harvest and i have some towers! Their starting to purple a bit and reek like a spicy blueberry smoothie

Looks great brother!

Im happy with the CMH quality to.. I've had alot of positive feedback and offers to buy my entire run of Loctite (Gorilla Glue x Mt Rainer) or people saying its the best weed they have had in awhile. Its a small run, of a single light, but I'd like to keep going with the CMH.

Im going to run this CMH for awhile by itself in a perpertual, see how it does. My only issue is weight, but its a hard thing to figgure out in a perpetual grow.

The black lime i'm running looks and smells awesome too. Great development of the terpenes, the lime smell is well defined in week 4, and trichromes, that reach out to the fan tips.

 

[positivity]

Great info on this thread. Can't wait to give cmh a try one day

 

[Cadfael]

Bulb should fire spectrum won't matter.. You need to wait 15 min before the ballast will refire.

Went in this AM and swapped out the lamp for the 492. Fired up nicely.

Thanks, Hammerhead. I appreciate the information.

 

[Hammerhead]

Cool, thats good....

The new bulb got here. This will be tested in the 5x5 where the LEC 630 is now. I will use a Lumitek 600w digital ballast to run it. Not sure if I will use the super lumen setting witch would be 660w. I sent them an email asking when there 630w Ballast would be Available. Waiting on there response.

UPDATE on the defective Phantom ballast I got from horticulturesource. After getting 2 defective 315 Phantom II Ballast I was issued a refund. Even though they covered the return shipping for both they kept 15$ of the original purchase price so I only got a partial refund. So the return ship was not covered in the end. When you purchase anything from theses guys regardless if the items are defective you wont get a full refund.

 

[kelly1376]

I hear you, but I've also read, and it makes sense, that the footprint is a function of the reflector and not the bulb... So that's a nice video, but 'we' need a video that compares the same bulb, the same conversion kit, with various already-offered hoods on-the-market.

The hood I'm using, Magnum XXXL, is also a horizontal bulb as opposed to the vertical bulb set ups of the LEC set ups, so that's going to change the reflectivity of the light as well.

I appreciate the heads up, on both the footprint and the penetration values of the 315w vs 600w, but for my particular situation, I'm okay with using the inner 3'x3' of a 4'x 4' for cannabis and using the outer perimeter for other plants, if that's how it works. I want to see, using my particular set up, though, how far towards the perimeter I can go before the flowers aren't what they should be.

I'm wondering, if with the right reflector, and turning the bulb, if you can't lower the intensity in the middle and spread that intensity around the perimeter.. Vertical or horizontal, the bulb should produce the same amount of light, so then isn't it a question of how effectively you can spread that amount of light, while minimizing the losses due to reflection?

I don't presume to know more than the lighting companies with their R&D, but I do know that an open hood wont work for my situation, a vertical bulb wont work for my situation, and keeping the dual 600's isn't going to work for me (heat).

You're right, it's the reflector that determines the spread. The spread will be the same as you had before only the intensity will be less. IMO the reason most of the 315w reflectors use vertical is its probably the only approach that allows good intensity from a small bulb. IIRC tests done on that reflector you have using 1000w showed an average of around 500 ppfd over a 4 x 4 canopy so you'll probably have to lower your lights significantly to get decent intensity.

 

[GET MO]

So is everyone dippin the ends of they 315 bulbs in the spcial paint befoe using them now? I mean the consensus was its better dipped for vertical hoods right? I got another phantom hood on the way, along with one of them 630 bulbs to go in a gavita dimmed down to 600...

 

[GET MO]

Also been hearing a few people say cmh speeds up flowering. I wonder if u were to run 12.5/11.5 light schedule if u could slightly increase yields while pulling crops at a schedule consistant with hps. Just some thoughts to play with, might try it...

 

[Hammerhead]

I put it on 1 bulb but I cant see any difference on the plants. . I'm not sure I would see a improvement on my scale buy doing it. I do see a 1-2 week faster flowering time. I'm still testing to verify.

 

[rives]

IMO the reason most of the 315w reflectors use vertical is its probably the only approach that allows good intensity from a small bulb.

The biggest advantage of a parabolic luminaire with a vertical lamp is the uniformity of the light footprint. It is nearly impossible to achieve homogeneous illumination with a horizontal lamp - the underside of a horizontal lamp gives direct light, the upper side reflected, one end can create a bright spot and the other no light at all. A vertical lamp can give all reflected light, and the lamp mounted at a uniform distance from the reflecting surface. The design loses some intensity over direct lighting but gives tight control over the light distribution. The overwhelming majority of industrial plant-floor lighting and warehouse lighting, whether high bay or low bay, is designed this way.