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Drek
Yeah, for me it's not really about gaining or losing anything, it's just easy and cheap, and the bulbs are already protected.
RikkiTikkiTavi
Member
i'm also of the do what works for you specific situation over whats supposed to be the best school of thought.
R
rüdiger
2x 100w 930 elite
they work so far
they work so far
R
rüdiger
jup straight 11/13 from rooted clone,
sativa dominant multi strain perpetual chaos
pots 0,7liter
2x 100w for flower , 1x 100w veg/mom/clone
sativa dominant multi strain perpetual chaos
pots 0,7liter
2x 100w for flower , 1x 100w veg/mom/clone
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Drek
I gotta say I find it kinda funny, that tall plant in the little pot.
Looks happy enough...
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Drek
A bunch of different varieties/pheno's.
Ttystikk
Member
I'm just getting into the CMH/CDM thing, and my setup is absolutely ideal for the 860 bulbs you mention above. If you can't use them, I'd be happy to pay you what you think they're worth to give them a try in my Super Silo system. I need big watts and vertical orientation, and I have convertible thousand watt magnetic ballasts. I'm up in Ft Collins, I make it down that way pretty regularly.
I'm currently running Plantmax HPS thouies, just replaced the old ones- two and a half years?- for this current run. Pic below is what those tired old lamps produced, along with three more like it:
Attachments
Ttystikk
Member
I went back only ten pages, and it's already been a long read! I've been put onto the 315 t12 elite agro by a buddy and fellow icmag member. Doing my research, I ran across one of these- and a somewhat similar lamp that runs at 375W. Links to both below;
http://www.gel-usa.com/#/products/ceramatek/CT375W
http://www.gel-usa.com/#/products/ceramatek/CT315W
My question is about the spectrum graph on the 375; is it to good to be true?
http://www.gel-usa.com/#/products/ceramatek/CT375W
http://www.gel-usa.com/#/products/ceramatek/CT315W
My question is about the spectrum graph on the 375; is it to good to be true?
LargePrime
Member
Is not the 315W way better?
Oh, I see. the 375W Web page has a spectral graph. But it does not match the Spectrial Graph on the 375W spec PDF.
The one on the 315 page seems to match the 930, not the better 942.
I have no idea what bulb has that spectrum on the 375W page. I might suggest it is fake. But everything on the internet is true, so....
Ttystikk
Member
I was smelling a rat, myself- which is why I post these things
I need to replace two thousand watt HPS lamps in my Super Silo. Will four of the t12 315W protected vertical placement bulbs really be sufficient? The 375W was attractive as much for the total output of four bulbs as the spectrum graph.
LargePrime
Member
that is tough to say.I was smelling a rat, myself- which is why I post these things
I need to replace two thousand watt HPS lamps in my Super Silo. Will four of the t12 315W protected vertical placement bulbs really be sufficient? The 375W was attractive as much for the total output of four bulbs as the spectrum graph.
I can find exactaly no real info about the Senlite bulbs except they claim 130,000 lm
I was just discussing with Rives in PM's about 315W vs 1K HPS or whatever. We both much prefer the 315W, but we are finding it hard to make the case in a commercial grow.
The 315 has much better PAR per watt and way more UV. and last way longer. But some growers have showen lights do not matter much.
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Looks like your last sentence got truncated, but this is exactly why I've been commenting. My gut says the 860 is weak sauce and very inefficient compared to DE hps when used in larger numbers.
That's why I think inter lighting or mixing lamps is still a better bet. If/when Philips releases a higher wattage agro cmh, surely that will be best of class for quality commercial production.
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Drek
CDM860 is 860watts of 3700k ceramic metal halide. There's no reason to compare it to HPS other than they both have ceramic arc tubes. CDM860 is a nice lamp.
Mixing lamps is almost always a worse bet than having a good spectrum emitting from a single source.
One is a point graph, the other a bar graph which tends to average adjacent wavelengths. I don't see them as terribly different.
LargePrime
Member
Sure call me out!
I was going to go on about Heath Robinson, and ask how really important lights, or light wattage is. but I was out of time.
They would if they could, but they literally can't.
It seems the 315W technology creates too much pressure to scale it up to a higher wattage safely. Although I do not have the documentation to support this theory.
Which is why, IMHO, you can draw a stark line between the 315W tech and any other similar CDM tech. This does not mean that other CDM tech can't beat other HPS or MH, or that it can. I am saying is that the 315W CDM is the current state of the art in HID lighting. But I am often wrong.
Ok then, but why is it that the web pic shows a series of peaks at ~430-450nm and the PDF show a dip in that range? There are other inconsistencies if you look close.
Or why do all the other PDFs have the same graphs and the 375 the average in the PDF and the peaks on the web page?
