Philips 315w CDM Elite (CMH)

[Hammerhead]

That leaflet is for T12. T12 bulbs have 2 glass envelopes. T9 only has 1.


Here is the UV data for T9. Looks lower. I have no clue what these # mean. I just want some UV on my plants.

• UV-related Characteristics
Damage Factor D/fc 0.013 -
PET (NIOSH) 141 h500lx
UV A 3.45 mW/cm2
UV B 0.01 mW/cm2
UV C 0.03 mW/cm2

 

[Mengsk]

http://www.assets.lighting.philips.com/is/content/PhilipsLighting/fp928601164602-pss-global

 

[King Rat]

That leaflet is for T12. T12 bulbs have 2 glass envelopes. T9 only has 1.


Here is the UV data for T9. Looks lower. I have no clue what these # mean. I just want some UV on my plants.

• UV-related Characteristics
Damage Factor D/fc 0.013 -
PET (NIOSH) 141 h500lx
UV A 3.45 mW/cm2
UV B 0.01 mW/cm2
UV C 0.03 mW/cm2

hey hammerhead, thats exactly what i wrote.
By T9 i mean the CDM-T Elite MW with exactly the same UV characteristics you have posted.

the Agro T12 bulb has more UV-A and UV-B with these characteristics:
• UV-related Characteristics
Damage Factor D/fc 0.17 -
PET (NIOSH) 241 h500lx
UV A 4.65 mW/cm2
UV B 0.02 mW/cm2
UV C 0.02 mW/cm2

Or am i reading it wrong the whole time ? LOL

 

[Dirt Bag]

hey hammerhead, thats exactly what i wrote.
By T9 i mean the CDM-T Elite MW with exactly the same UV characteristics you have posted.

the Agro T12 bulb has more UV-A and UV-B with these characteristics:
• UV-related Characteristics
Damage Factor D/fc 0.17 -
PET (NIOSH) 241 h500lx
UV A 4.65 mW/cm2
UV B 0.02 mW/cm2
UV C 0.02 mW/cm2

Or am i reading it wrong the whole time ? LOL

Phillips holds the patent on a special kind of glass called Fadeblock® that blocks most UV in an attempt to minimize fading of colors in retail environments. This special, patented substance is used in most Philips CDM bulbs with the exception of the Elite Agro and a few others. This is not the same as UV Block, which concentrates on blocking the more harmful UV-B and UV-C.
I believe that the Eye Hortilux CMH produces more UV-A but apparently at a loss of total output compared to the Philips.

Don't they make specific UV spectrum LEDs? Seems like a possible solution for just adding UV...

 

[Hammerhead]

I didn't see any T9 data posted. These are for 930 bulb

T12 4.65

T9 3.45

Yes they make UV LED's

Here is the UV data for 942 T12. This is the bulb I saw the higher UV values. I can't find the UV data for T9 942. I'm not sure you can even find T9 bulbs anymore.

UV-related Characteristics
Damage Factor D/fc 0.20 -
PET (NIOSH) 26 h500lx
UV A 5.82 mW/cm2
UV B 0.03 mW/cm2
UV C 0.20 mW/cm2

 

[King Rat]

so in summary the 930agro IS producing more of UV-A & UV-B even with that outer bulb
can't await the next grow with all cmh i'm already pretty thrilled

 

[Hammerhead]

942 T12 produces more UV than the 930 agro.... I use both 942/930 in my fixtures.

 

[King Rat]

i just received my cmh sets lets see how they work, i've read nothing but great things about them

 

[HorseBadoritiz]

i just received my cmh sets lets see how they work, i've read nothing but great things about them

Did you get Philips lamps with these sets?

 

[King Rat]

Did you get Philips lamps with these sets?

yes the sets i got included 315W lumatek electronic ballast, the philips greenpower 930 bulb and a mogul adapter.

 

[Hammerhead]

My Chinese 630 cmh ballast died last night. Tried a new bulb also wouldst fire, Its toast. It lasted a bit over 2 years. This is a no name ballast. Ive had 2 die total. The other one was a phantom II..

 

[Home-Grown]

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[Hammerhead]

Yes EBM

 

[gh0stm0de]

In 2017 EBM released an updated 630 ballast. I am curious if you have the new or older generation. Do you mind sharing the dimensions of the ballast that failed, Hammerhead?

 

[Hammerhead]

I didn't get the model with dimming or LED display. Its there original version. I didn't like the mold they used to make these. It has a step up from the base to the mounting flange. Makes it difficult to mount flush to a wall.

 

[Home-Grown]

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[Mengsk]

No dial. Wasn't sure if I would need it. Starting seedlings under a CFL or T5 light I can transfer them to the CMH. 100w T5, 250w MH, 315w CMH.

If I flower indoors using 1k HPS it will be for comparison with CMH. My initial thought or prediction is the 315s are worthwhile to use. If power bill is higher with HPS there is no reason to use them unless already purchased. Quite expensive so may require several grows to recover investment financially. Power cost can be a different category from flower quality.

This might sound a little odd or picky but I would try to avoid mounting them directly to the wall. Suspended or resting in the coolest place e.g. on the concrete floor outside of the grow area and/or with fans would be good. If you do be careful drill pilot holes I would recommend nylon washers if not rubber feet stand offs. Or hang them on nails/hooks. Air circulation or heat and maybe accidentally twisting the circuit board would be my concern.

The length of this cool tube is right for two 315s or one 1000 but that doesn't mean I need to add more light. Only packaging, as I doubt I'll find a cool tube built 1/2 as long.

 

[Hammerhead]

Most CMH fixtures have the ballast attached. I only have a few that are remote ballast. I replaced the EBM with this 1 for 85$. Should get here in a few days. Im gonna put it on a killawatt meter to see what the actual wattage is.

https://www.ebay.com/itm/Digital-Grow-Low-Frequency-Square-wave-630W-CMH-CERAMIC-METAL-HALIDE-CDM-Ballast/112751758970?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

 

[Home-Grown]

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[Hammerhead]

I'm a bit curious if this 630 is the same size as a 315 ballast. I find it odd they could be the same size. I'm thinking these people might list them as 630 but in reality there just 315w. 315w ballast will fire a 630w bulb. I will post my results.