Philips 315w CDM Elite (CMH)

[DemonTrich]

You need some new genetics!

I run 4x 315 in a sealed co2 dialed in room and kill it every run.

 

[zachrockbadenof]

You need some new genetics!

I run 4x 315 in a sealed co2 dialed in room and kill it every run.

the only positive is the various mums we kept (we have 8 mums) r all the best of what we have grown... prob have grown over 100 diff varieties...while more would be better, we grow for quality, but every grow we grow 1 or 2 new ..diff seeds looking for that special lady...

 

[Home-Grown]

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[dank.frank]

I never hit a lb with a 400w. Even in aeroponic tubes, I never hit that mark. That was a long time ago and I'm certainly a more competent grower now, but still, I think that is the threshold of success with a 400w. I've known many an excellent grower not hit that mark with a 4 banger.

It's much easier with a 315w CMH - that is certain.



dank.Frank

 

[Home-Grown]

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[Dog Star]

Somebody mentioned that CMH need some good distance from plants to perform
much better than when is closer to plants???


Am goes 40-45 cm but somewanne mentioned it needs to be 24 inch per one 315w..?!


What is a sweet spot for CMH???

 

[Grower369]

Somebody mentioned that CMH need some good distance from plants to perform
much better than when is closer to plants???


Am goes 40-45 cm but somewanne mentioned it needs to be 24 inch per one 315w..?!


What is a sweet spot for CMH???

I would also like to no the sweet spot for Cmh

 

[dank.frank]

Personally, I find that 11-14" from the tops of the plants being about as close as I want to get. That gives 16-18" of canopy depth penetration. (315w)



dank.Frank

 

[Grower369]

Personally, I find that 11-14" from the tops of the plants being about as close as I want to get. That gives 16-18" of canopy depth penetration.



dank.Frank

hello Dank Frank how far would you keep it for newly sprouted
seedlings ? or would u use t5 for starting them

 

[dank.frank]

Can't say as I've not used the lights in that manner. Sorry.



dank.Frank

 

[HorseBadoritiz]

Depends...


I don't use a cmh for seedlings, but I'd start off high, 2', and see how it goes.


For veggers and bloomers, I can let the plants get a couple of inches from the lights,


as long I have good air movement over the canopy, and rotate the plants 1/4 turn every day.


I try to keep the lights 10-18" above, but that plan doesn't always pan out!

 

[Grower369]

HorseBadoritz thanks for the info

 

[Lyfespan]

anyone look into these 1000 watt DE CMH fixtures yet?

https://nanoluxtech.com/cmh-1000w-fixture/

im setting up a new room and these look promising but, we know how that goes.

also hows the canopy penetration on the CMH, i am prepared to side light my room, but would rather not.

 

[Miraculous Meds]

hello Dank Frank how far would you keep it for newly sprouted
seedlings ? or would u use t5 for starting them

I start at 30" with vert cmh hoods on seeds and young transplants. You can veg excellent plants at 24 to 30" with vert 315's. If you have a par meter, i shoot for 250 to 300 to start, and as they take off move up to 500 umol in veg.

 

[bonglemonade]

Hello Everyone, Is 18 gauge wire to small to use for 315w cmh ballast to bulb and input power?

 

[gmanwho]

anyone look into these 1000 watt DE CMH fixtures yet?

https://nanoluxtech.com/cmh-1000w-fixture/

im setting up a new room and these look promising but, we know how that goes.

also hows the canopy penetration on the CMH, i am prepared to side light my room, but would rather not.

i have a few of the 935 (3 315watt bulbs in one lamp/bulb) de cmh bulbs in nanolux de 1000 fixtures. they are bright, real bright. love them for hard vegging before the flip.



since i bought them i think they came out with the 1000w de cmh with 2 larger bulbs in the one lamp. I haven't had a chance to run those thou. I believe those are more stable in terms of longevity.


i dont remember the numbers when I TESTED par values, but the de cmh was throwing more par then the phillips growmaster 1000w on same watt setting.


been awhile since i flowered with the de cmh. i do however have a side by side going now.



best of luck!! theres some good info out there in your searches ..

 

[dank.frank]

I've been updating my results with 315w CMH in this core thread.

I just finished the totals for my 2nd cycle with 2 x 315w Growers Choice with 3100K(r) bulbs. Flowering room is 2.5' wide x 5' long.

2nd round totals for 8 plants in a 60 gallon water only organic soil bed was 712g, right at 1.1 gpw.

Needless to say. I'm very impressed with these lamps. I can't really say I've seen any reduction in flower times like many others, but I can certainly agree these things absolutely crush a standard 400w HPS of any variety. Makes them completely obsolete.

This will probably be my last review / check in with this thread. If you want to follow along as I try to chase 2# in that space, feel free to click the link to my current grow in my signature - although, I'm playing with some new prototype quantum panel LEDs now.

Not sure why because I'm crushing it with CMH.

dank.Frank

 

[catalyte]

hey been super busy lately and only just realized i have been running my Philips 315 cmh green power bulbs for almost two years straight. i did a bit of math and i think i have ran them for about 10,000 hrs. i read somewhere that they are rated for 20,000 hrs.....

at what point do you other cmh users swap out the Philips Green Power 315w bulbs?

 

[Guest]

Are Philips bulbs the best option for UV? Is it safe to assume they all emit similar levels of UV?

 

[Hammerhead]

hey been super busy lately and only just realized i have been running my Philips 315 cmh green power bulbs for almost two years straight. i did a bit of math and i think i have ran them for about 10,000 hrs. i read somewhere that they are rated for 20,000 hrs.....

at what point do you other cmh users swap out the Philips Green Power 315w bulbs?

For me I swap out lamps at 14 months.. You can find data that has 9 months. I dont use Phillips. I use Growers Choice.

Are Philips bulbs the best option for UV? Is it safe to assume they all emit similar levels of UV?

I dont think CMH UV varies much from any of the bulbs?. I thought I read MH bulbs have more UV?.