Philips 315w CDM Elite (CMH)

[rives]

Maybe this one - https://www.icmag.com/ic/showthread.php?t=243060

He's started 273 threads according to the search, and I'm not sure where he used them. Try the advanced search function on the upper right, and put his name in. He was using 1kw MH lamps and I'm pretty sure he moved over to the 860's before he recently went to DE's.

 

[dbkick]

Maybe this one - https://www.icmag.com/ic/showthread.php?t=243060

He's started 273 threads according to the search, and I'm not sure where he used them. Try the advanced search function on the upper right, and put his name in. He was using 1kw MH lamps and I'm pretty sure he moved over to the 860's before he recently went to DE's.

Thanks, still getting a handle on how things tick here. I'm def not new to growing or pot forums (if bad ones count) but it's a touch different here.

 

[dbkick]

I'm just not seeing much in the important part of this lamp, running it on a digital.
I do a search on hortilux platinum and 5 of the 15 matches I've posted in.
I see a DNA thread but they seem to think an "ultra high " freq ballast will run the 860 and that's basically why they failed, right idea, wrong ballast design.
CMH runs at optimal <174 hz .
A hortilux platinum runs at 120 hz with less than 4% THD. This pretty much determines the performance and longevity of the lamp run on a LFSW digital ballast at 1kw.

 

[dbkick]

Not to get off topic, the 315 cdm is a decent light, I'll own for different ones before it's over.
Started with SS LEC and ended up with a 315 cdm in a SS luxor hood on an phantom cmh 315 ballast. The thing does the entire 4by4 tent (almost, need a little led at the edges, proper white of course) .

 

[Lungy]

Anyone seen the sunplix 315's with remote controlled ballast's

https://twitter.com/sunplix

 

[dbkick]

Anyone seen the sunplix 315's with remote controlled ballast's

https://twitter.com/sunplix

Ive seen kits here on craigs and they were asking 450 a kit, not even sure if that includedc lamp but there was no reflector, for that money you could buy an entire hydrofarm cmh 315 lamp, reflector and air cooled option for the hood, n nice looking ballasts though.

 

[HarvestMoon303]

Side by side test (in bloom)

Side by side test (in bloom)

I'm growing a bed of plants with a new bulb, digital 1000 HPS, and I'm growing the same number of plants in the other bed with 2 x 315 CMH (Phillips). The color difference between the HPS and the CMH is pretty amazing. l will report back on the progress, but they won't be done for about 10 weeks. Has anyone tried such a side-by-side (essentially 2 x 315's vs a 1000HPS)?

Same strain, same cut, same # of plants, same temps and airflow, same size, same nutes and water. What is done to one bed is done to the other.

I've seen suggestions of 3 x 315 to replace 1 1000HPS, but by then, there isn't any power savings, and the equipment costs are getting up there. It would be less heat, but that's about it, right?

I'll keep ya posted.

 

[Ez Rider]

I'm growing a bed of plants with a new bulb, digital 1000 HPS, and I'm growing the same number of plants in the other bed with 2 x 315 CMH (Phillips). The color difference between the HPS and the CMH is pretty amazing. l will report back on the progress, but they won't be done for about 10 weeks. Has anyone tried such a side-by-side (essentially 2 x 315's vs a 1000HPS)?

Same strain, same cut, same # of plants, same temps and airflow, same size, same nutes and water. What is done to one bed is done to the other.

I've seen suggestions of 3 x 315 to replace 1 1000HPS, but by then, there isn't any power savings, and the equipment costs are getting up there. It would be less heat, but that's about it, right?

I'll keep ya posted.

I'm getting WAY less stretch with the cmh vs hps. This could slant your side by side results. I know it's affecting my yield on the first run with cmh.

 

[Jhhnn]

I'm getting WAY less stretch with the cmh vs hps. This could slant your side by side results. I know it's affecting my yield on the first run with cmh.

You may end up pleasantly surprised. It seems like I just end up with less stems, not less buds. My approach isn't really scientific like HM303's but I know what I could get out of the space before & after the switch growing different varieties. I just grow for family & friends. The only reason I weigh it is to get a handle on how well I'm doing & i seem to be doing about the same.

The electric bill is lower & it's easier to control temps so it's all good from my perspective.

 

[GoldenSyrup]

You may end up pleasantly surprised. It seems like I just end up with less stems, not less buds. My approach isn't really scientific like HM303's but I know what I could get out of the space before & after the switch growing different varieties. I just grow for family & friends. The only reason I weigh it is to get a handle on how well I'm doing & i seem to be doing about the same.

The electric bill is lower & it's easier to control temps so it's all good from my perspective.

I seem to be having the opposite problem, under HPS I managed to keep things nice and compact however under the ceramics plants are literally packing the entire space out top to bottom wall to wall.

Yield is up by about 10 ounce on the same wattage with HPS, mind you. But a cut known for being very compact and only stretching at most 1.5 x over a 6 week period in flower under HPS went fucking crackers and produced some 2ft long colas and I had to strap the lamps to the ceiling of the tent!


Same thing has happened this time, cuts I've never ran before but they have rammed the tent top to bottom.

 

[Jhhnn]

I seem to be having the opposite problem, under HPS I managed to keep things nice and compact however under the ceramics plants are literally packing the entire space out top to bottom wall to wall.

Yield is up by about 10 ounce on the same wattage with HPS, mind you. But a cut known for being very compact and only stretching at most 1.5 x over a 6 week period in flower under HPS went fucking crackers and produced some 2ft long colas and I had to strap the lamps to the ceiling of the tent!


Same thing has happened this time, cuts I've never ran before but they have rammed the tent top to bottom.

Like I said, what I'm doing isn't terribly scientific. If you're using two 315's to replace a single 600w or any similar ratio you're producing a lot more light so of course the plants will go nuts.

What Ez Rider was talking about was internode length. In general, CDM users report that they're shorter.

 

[Lowman]

I see lots of talk about the greenpower 400. What are your thoughts on the greenpower 600. Getting very hard to find these days...but I have always liked them.

Anyone noticing a performance difference between the Mogul 315 and that pin socket one?

ATL finally came through with my lights...and I will be wiring them up on tues.

 

[Hammerhead]

excessive heat and distance to bulb will have much more impact on stretch from what I have seen. I don't flower with mine. I have tried using HPS in veg. MH/CMH has always been better.

 

[Jhhnn]

excessive heat and distance to bulb will have much more impact on stretch from what I have seen. I don't flower with mine. I have tried using HPS in veg. MH/CMH has always been better.

That may explain part of what I'm experiencing because temps are def much cooler. I just grow from seed, one batch after the other. Every pack is like another box of chocolates.

 

[Jhhnn]

I see lots of talk about the greenpower 400. What are your thoughts on the greenpower 600. Getting very hard to find these days...but I have always liked them.

Anyone noticing a performance difference between the Mogul 315 and that pin socket one?

ATL finally came through with my lights...and I will be wiring them up on tues.

Dunno about the greenpowers but the mogul & pgz 942's should perform equally well.

 

[Ez Rider]

You may end up pleasantly surprised. It seems like I just end up with less stems, not less buds. My approach isn't really scientific like HM303's but I know what I could get out of the space before & after the switch growing different varieties. I just grow for family & friends. The only reason I weigh it is to get a handle on how well I'm doing & i seem to be doing about the same.

The electric bill is lower & it's easier to control temps so it's all good from my perspective.

Hope you're right on the pleasantly surprised part. I'm growing much smaller plants than I normally do, so my perspective could be skewed. I'm not terribly concerned for this run, although I'd like to reach my maximum potential just on G.P.'s. I've been growing my cut for quite awhile now, but it definitely grows differently under the cmh. I'm sure it will be lovely once everything is dialed in.

I seem to be having the opposite problem, under HPS I managed to keep things nice and compact however under the ceramics plants are literally packing the entire space out top to bottom wall to wall.

Yield is up by about 10 ounce on the same wattage with HPS, mind you. But a cut known for being very compact and only stretching at most 1.5 x over a 6 week period in flower under HPS went fucking crackers and produced some 2ft long colas and I had to strap the lamps to the ceiling of the tent!


Same thing has happened this time, cuts I've never ran before but they have rammed the tent top to bottom.

Are your cuts indica, sativa, or hybrids of the 2? I'm growing SourBubble, which is about as indica as it gets. She stretches ~50% less under the CMH vs HPS.

Like I said, what I'm doing isn't terribly scientific. If you're using two 315's to replace a single 600w or any similar ratio you're producing a lot more light so of course the plants will go nuts.

What Ez Rider was talking about was internode length. In general, CDM users report that they're shorter.

I replaced 2-1K hps(se) with 6-315 Greenbeams, so if anything, I've got more light, and the plants are definitely staying more compact, both internode distance and overall stretch.

 

[timmur]

Hope you're right on the pleasantly surprised part. I'm growing much smaller plants than I normally do, so my perspective could be skewed. I'm not terribly concerned for this run, although I'd like to reach my maximum potential just on G.P.'s. I've been growing my cut for quite awhile now, but it definitely grows differently under the cmh. I'm sure it will be lovely once everything is dialed in.


Are your cuts indica, sativa, or hybrids of the 2? I'm growing SourBubble, which is about as indica as it gets. She stretches ~50% less under the CMH vs HPS.


I replaced 2-1K hps(se) with 6-315 Greenbeams, so if anything, I've got more light, and the plants are definitely staying more compact, both internode distance and overall stretch.

If you're delivering more light then I would expect a shorter internodal length. Considering that CMH has more blue spectrum I would expect a reduction in internodal length from this as well.

 

[Avinash.miles]

in veg im seeing way larger fan leaves and larger stem diameter on the CMH side of the room compared to 600w HPS

 

[GoldenSyrup]

Like I said, what I'm doing isn't terribly scientific. If you're using two 315's to replace a single 600w or any similar ratio you're producing a lot more light so of course the plants will go nuts.

What Ez Rider was talking about was internode length. In general, CDM users report that they're shorter.

That run was my first all-CMH run start to finish, previously I had been using 1515w (2 x 600w gavita and 1 x 315w cmh) so when I switched to using all ceramics ( 4 x 315w) I was actually using less wattage but got a 10 ounce improvement on yield!

As for internode length then yes I would say they are shorter despite them growing buds as long as my arms - another thing I have noticed is that smaller buds that join to form the larger cola are much, much, branchier - almost fractal in that they are minimicing what the larger colas are doing but on a smaller scale - I never noticed it so pronounced under HPS. (I will try and get some photos of that)

Are your cuts indica, sativa, or hybrids of the 2? I'm growing SourBubble, which is about as indica as it gets. She stretches ~50% less under the CMH vs HPS.

The cut in question is a Sativa dom indica hybrid - the point of the cross was a plant that grew like an indica but had the high of a full Sativa (Smile by Oldtimer1).

Under HPS the plants hardly stretched, it was such a slow stretch over about 6 weeks I almost missed it! Under the ceramics I'd say they stretched and filled out 100 - 200% more than under the sodiums.





Here are two pictures, the first is of "Smile" which I am mentioning, as you can see they stretched like fuck. I put a net in at the last minute to try and contain them a bit - glad I did or I'd have to have taken the tent down!




Here are the "Disco Biscuits" (A cookies dom cross) and "Smottie Remix" a UK-homebrew project (These have been swamped under the cookie crosses under the filter to the left) ((21 days flower here))




Here is a picture of the above plants on their last day of veg, they probably weren't even a meter tall at that point!

 

[theLumberjack]

in veg im seeing way larger fan leaves and larger stem diameter on the CMH side of the room compared to 600w HPS

i was getting much larger stems and denser root mass as well