Everything I wrote is shown to be correct from the SPDs you listed. And if you look at the work by Dr. Bugbee you referenced, you'll see the bigger NIR spike from the GreenPower (3rd screenshot you posted), as well as higher R:Fr ratio (using a 10 nm range, with 5 nm + and -), and, greater UV from the MasterColor (942; the first screenshot).I'm sorry but none of this seems consistent with the product literature:
MasterColor CDM-T Elite 315W/942 T12 U P
http://download.p4c.philips.com/l4b/9/928601167302_na/928601167302_na_pss_aenus.pdf
View attachment 306892
MasterColor CDM-T Elite 315W/930 T12 U P
http://download.p4c.philips.com/l4b/9/928601167102_na/928601167102_na_pss_aenus.pdf
View attachment 306891
Mastercolor CDM-T Elite 315W T12 CL Agro P
http://download.p4c.philips.com/l4b/9/928601172201_na/928601172201_na_pss_aenus.pdf
(spd for the agro is not on the last cut sheet)
View attachment 306886
Agreed. However, there is worthwhile difference between the flavors of CDMs from Philips, granted, they're not major, and simply choosing Philips CDM is a big improvement over HPS and MH. I think it's important to note not in terms of photosynthetic efficiency, however, which is where DE HPS really shine - no pun intended.I think we're down to splitting hairs between the various flavors of Philips 315w lamps. They all show vastly less wasted energy in the infrared compared to HPS with standard MH being intermediate. What difference there is between the CMH lamps wrt infrared appears to be small.
It's po-tay-toes and po-tah-toes between the CMH lamps for me, anyway. I'll try to gather the bits as bargains to convert my super sun 2 to handle two 315 lamps when I shut down for summer. Using an enclosed fixture, I'll happily buy the least expensive among them, believing that they'll all do a great job & save money in the long run over my current 1000w system. T9, T12, 942, 930, Agro- it's all good.
BTT, I think that you are misinterpreting the Philips' names (pretty damn easy to do considering the frequency that they change).
The MasterColor (or MasterColour) name has been around since the beginning, and I believe has been applied to the entire series of 315 lamps. I have a bunch of T9 930's with a manufacture date of August, 2009 that all carry the MasterColour name, as well as my T12 Agro's (pre-dating the GreenPower - I don't have any of that generation yet).
Quote from the mogul base version brochure - "The Philips MasterColor CDM Elite Medium Watt system offers an unrivalled level of light quality and performance. The lamp’s sparkling white light creates a natural ambience and portrays vibrant colors."
From the original design guide - "MasterColor CDM Elite MW is a medium wattage lighting solution based on Philips unique CDM technology. This technology provides high quality and highly efficient white light and consists of a special developed lamp, ballast and holder." http://www.lighting.philips.com/pwc...literature/downloads/elite_design_guidev7.pdf
Examples - http://www.lighting.philips.com/mai...m-t-elite-med-wattage/928601164602_NA/product
http://growershouse.com/philips-mastercolor-elite-315w-lamp-t12-3100-k
This is the bulb that Advanced sells in their combo.
CDM315/U/O/4K ED37 MasterColor CDM Elite Medium Wattage
It's the only mogul base Philips CMH I can find. How does it compare to the lamps with PGZ bases? I'm having a hard time figuring out who is talking about what!
Thanks!
I would like to summarize the findings for the sake of clarity (please correct if wrong):
-There are actually two different Philips 315W "930" bulbs (spectrum wise, as each come in multiple base options).
-One of the two 930 (meaning 3000K range) bulbs is branded the "Elite Agro," often mislabeled on websites as "Argo," and is also known as (and called on the same box) the "Green Power." This bulb has a monster spike in the 670-685nm and seems to quite clearly be the best choice for bloom.
-The other 930 bulb seems to have a good bit more valuable 630-660nm radiation than either other bulb, but also has FAR less blue than the 942 and none of the monster red spike of the Agro, and most of the territory where it throws more light than the other bulbs is in the 525-610 range, which is less desirable than the red or blue, making it probably worse than either of the other two bulbs for growing.
-There is only one flavor (spectrum) of 942 bulb in 315W CDMs, and it has the most blue/the highest blue to red ratio, while also having excellent mid-range red, so it is probably the best veg bulb (depending on what sort of structure you are looking to develop; the higher blue should keep ladies bushier and nodes tighter, which is generally desirable for indoor growing).
...Although after looking at the graphs BTT provided, I am skeptical as to whether the 50 micromoles of extra blue (~28%) + extra green in the 942 is worth sacrificing 120 micromoles of red (from the Agro). It's funny, looking at the spds convinced me that the 942 was a better VEG bulb, but the bar graphs seem to make the information clearer. I guess in the end only a good test will really settle it.