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Philips 315w CDM Elite (CMH)
- Thread starter rives
- Start date
Thanks for that. Can you give us a link to that? I had it at one point but Philips changed it around & navigating their site isn't exactly a breeze...
A search turns up nothing. I've got the pdf file, but I don't think that you can upload them to here.
*edit* I did find this one, but it is substantially shorter - https://www.lightbulbs.com/catalog/...-MasterColor-CDM-Elite-MW-Lighting-System.pdf
digging
Member
CMH questions …
CMH questions …
@hammerhead thanks for suggesting I post my questions here
I have some questions with regards to CMH lighting I am hoping you guys can help answer please.
When would someone use a 315 watt CMH light compared to a 630 watt CMH light in vegg ?
Is the decision to use a 315 watt CMH over 630 watt CMH is based on the height you are vegging a plant out to ? If so at what height in vegg would you change over from 315 watt CMH over to a 630 watt CMH light ?
What real world foot print does a 315 watt CMH create in vegg, and what real world foot print does a 630 watt CMH light create ?
At what height would you keep a 315 watt CMH light above the plant canopy in vegg, and at what height would you keep a 630 watt CMH light above the canopy for vegg ?
From my readings people @hammerhead have expressed they are getting the same yield with a 630 watt CMH lighting as they did with a 1000 watt HPS. Recently there are 1000 watt de CMH lights being sold. When would someone start to use a 1000 watt de CMH light over a 630 watt CMH light ?
Does it come down to height of the plant one is growing ? If so at what height would someone replace their 630 watt CMH light with a 1000 watt CMH light ?
At what height over the canopy would be best for both a 630 watt CMH light as well as the new 1000 watt de CMH light ?
What is everyone's thoughts about the newly released 1000 watt de CMH light ? Is this new 1000 watt CMH light a game changer ?
How will this new 1000 watt de CMH light compete and compare to the gavita de 1000 watt lights ?
Please don't factor in cooling as I have the ability to cool to what ever is required. I am looking for the optimal specs in my above noted questions to get the most out of CMH lighting
Thanks in advance for everyone's help with answering my questions.
CMH questions …
@hammerhead thanks for suggesting I post my questions here
I have some questions with regards to CMH lighting I am hoping you guys can help answer please.
When would someone use a 315 watt CMH light compared to a 630 watt CMH light in vegg ?
Is the decision to use a 315 watt CMH over 630 watt CMH is based on the height you are vegging a plant out to ? If so at what height in vegg would you change over from 315 watt CMH over to a 630 watt CMH light ?
What real world foot print does a 315 watt CMH create in vegg, and what real world foot print does a 630 watt CMH light create ?
At what height would you keep a 315 watt CMH light above the plant canopy in vegg, and at what height would you keep a 630 watt CMH light above the canopy for vegg ?
From my readings people @hammerhead have expressed they are getting the same yield with a 630 watt CMH lighting as they did with a 1000 watt HPS. Recently there are 1000 watt de CMH lights being sold. When would someone start to use a 1000 watt de CMH light over a 630 watt CMH light ?
Does it come down to height of the plant one is growing ? If so at what height would someone replace their 630 watt CMH light with a 1000 watt CMH light ?
At what height over the canopy would be best for both a 630 watt CMH light as well as the new 1000 watt de CMH light ?
What is everyone's thoughts about the newly released 1000 watt de CMH light ? Is this new 1000 watt CMH light a game changer ?
How will this new 1000 watt de CMH light compete and compare to the gavita de 1000 watt lights ?
Please don't factor in cooling as I have the ability to cool to what ever is required. I am looking for the optimal specs in my above noted questions to get the most out of CMH lighting
Thanks in advance for everyone's help with answering my questions.
I'm getting better GPW using 630's vs 1kw hps. I use all 315 for veg. Larger veg space one might consider using 630. I don't see the need to use 630's for veg. I see many using all 315 in flower getting great results. CMH is a more efficient light. HPS is dead for me
IMO 1kw CMH OR HPS are not best for home use. These are more for commercial builds or a place with 10' ceilings to use them properly. I treat my 630's just like I did 1kw. Canopy distance is the same.
No one uses 1kw CMH that I'm aware of so no info... If someone wants to send me a 1kw CMH I will test it lol.
IMO 1kw CMH OR HPS are not best for home use. These are more for commercial builds or a place with 10' ceilings to use them properly. I treat my 630's just like I did 1kw. Canopy distance is the same.
No one uses 1kw CMH that I'm aware of so no info... If someone wants to send me a 1kw CMH I will test it lol.
digging
Member
@hammerhead Thanks so much for your reply.
I should have provided more information. My inquiries are all commercial building related.
My flower rooms are 22' x 37'. The rooms are actually 42' long but the end 5' is for a walkway.
The ceiling is 10' in the flower rooms and 7' in the veg. Rooms.
I am just about to purchase the lights and just making sure I purchase the correct ones.
The plants ( Original Glue & Darlin's Net ) ( would love to get a cut of Darlin's Net #6 ) will veg in soil in one gallon pots for a month and a second month in 2 gallon pots and then repotted into 7 gallon pots when they go into the flower rooms.
Each flower room will have 150 of 7 gallon pots. The height of them going into the flower room from the veg room will be about 3' tall.
Good to know I can vegg them all under 315 watts CMH's
Now I have to decide to flower under 630 watt CMH's or go with the 1000 watt de cmh's, and how many lights whether they be 630 watt or the new 1000 watt de CMH's.
Thanks @hammerhead for all the experience and knowledge you are sharing, it's greatly appreciated enabling me to finalize up what I need to order
I should have provided more information. My inquiries are all commercial building related.
My flower rooms are 22' x 37'. The rooms are actually 42' long but the end 5' is for a walkway.
The ceiling is 10' in the flower rooms and 7' in the veg. Rooms.
I am just about to purchase the lights and just making sure I purchase the correct ones.
The plants ( Original Glue & Darlin's Net ) ( would love to get a cut of Darlin's Net #6 ) will veg in soil in one gallon pots for a month and a second month in 2 gallon pots and then repotted into 7 gallon pots when they go into the flower rooms.
Each flower room will have 150 of 7 gallon pots. The height of them going into the flower room from the veg room will be about 3' tall.
Good to know I can vegg them all under 315 watts CMH's
Now I have to decide to flower under 630 watt CMH's or go with the 1000 watt de cmh's, and how many lights whether they be 630 watt or the new 1000 watt de CMH's.
Thanks @hammerhead for all the experience and knowledge you are sharing, it's greatly appreciated enabling me to finalize up what I need to order
if ur running a commercial site just get 1kw CMH. There still gonna be better the any HPS. They all have dimming capability if that's ever needed. Growers Choice decided to discontinue there 630 DE lights. They went to dual 315's. They also make 1kw standard digital ballast that can handle there 1kw CMH bulbs. You can use Gavita controllers on these. Most Ballast can run CMH. U will still lose some bulb life using them.
digging
Member
Thanks
What foot print would you suggest with the 1000 watt CMH ?
I was going to go with 5 rows of 9, puttting 5 of them in a 22 ft width and 9 of them in each row of 37 ft length flower rooms for a total of 45 in 814 sq/ft of actual useable flowering space ?
Is this too many or perfect amount of 1000 watt de CMH lights per this space ?
I so appreciate your help
What foot print would you suggest with the 1000 watt CMH ?
I was going to go with 5 rows of 9, puttting 5 of them in a 22 ft width and 9 of them in each row of 37 ft length flower rooms for a total of 45 in 814 sq/ft of actual useable flowering space ?
Is this too many or perfect amount of 1000 watt de CMH lights per this space ?
I so appreciate your help
You want at least 40w sqf...
22 x 37=814/ 40,000w=49.1w sqf..
How you arrange the lights is up to you. 1kw will cover a 5x5 space. There are online cal to help u design the room.
https://www.sunlightsupply.com/page/lighting-layout-tool-help/
22 x 37=814/ 40,000w=49.1w sqf..
How you arrange the lights is up to you. 1kw will cover a 5x5 space. There are online cal to help u design the room.
https://www.sunlightsupply.com/page/lighting-layout-tool-help/
Philips says 89% of full output at 12K hrs. I wouldn't change lamps before that.
http://www.assets.lighting.philips.com/is/content/PhilipsLighting/fp928601164631-pss-global
It's slightly higher for 942 lamps-
http://www.assets.lighting.philips.com/is/content/PhilipsLighting/fp928601167331-pss-global
Good info thanks.
Is there an effect on yield when the output is diminished by 10%? The cost of the replacement bulbs is slight compared to the yield per light.
Likely so. OTOH, that relationship may not be linear in a given situation. 10% less light may not be 10% less yield. A very dialed in production grower could probably quantify it but I'm not that guy.
Coughie
Member
Is there any recommended distance to keep a 315 CMH from the plant canopy, when the bulb is horizontal as opposed to vertical?
The bulb is also air-cooled, in this case, it's in a vented hood with glass.
I can only seem to find vertical numbers, and they are all over the board anyhow, everywhere from about 18-30 inches
The bulb is also air-cooled, in this case, it's in a vented hood with glass.
I can only seem to find vertical numbers, and they are all over the board anyhow, everywhere from about 18-30 inches
I keep mine around 18 to 24 inches, but I only use it for veg.
UncleBens
Member
For veg I put mine at the top of the tent and leave it there, works great, no stretching at all(with the lec reflector). In the flowring tent I have a maxibright horizon reflector between two 600 watt hps, with the bulb horizontal. Its quite hot underneath it so wouldnt want it closer than 24". Again though, i just put it at the top of the tent and leave it there.
18-24" is where mine generally run with taller specimens getting within a foot or so. My grow style is pretty casual while the reflector & space give good bounce off the walls encouraging side buds.
