Light ???

ttystikk

ttystikk

Well-Known Member
TheChemist77 said:
over a 5x6 area, i have 2 315 watt cmh over a 4x6 table then 5 5gal buckets on the side, should i use 3 cmh or 2 cmh and add 1 400 watt hps for adding some red to the spectrum?
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At 5x6=30 ft², you're looking at two HPS thouies for decent coverage. I just don't see how you'll do that space justice with less than four 315W fixtures. They're good lights, but they won't work miracles.

I have run HPS thouies on digital ballasts alongside my 860W CDM lights and the plants really seem to prefer the CDM light. Yes, the extra blue does trigger phototropism, but the plants nearest the HPS also seem to be less healthy and robust in general and are the first to exhibit signs of stress from any source.

In short: if the lamp works because it has great spectrum, why would you try to 'fix' it with a lamp with terrible spectrum characteristics? The plant's response seems pretty logical to me when viewed from this perspective!
 
Dr. Who

Dr. Who

Well-Known Member
a senile fungus said:
We need a place to consolidate all the CMH talk...

I've been jumping back and forth over a few threads regarding this tech.

I know @borbor has one. And @GroErr and @ttystikk and others that I can't think of...

I used my 2x CMH in flower and they did great. I've since been using them in my veg area, still doing great. Barely any heat produced, I'm cooling two of them with a 8inch booster fan, that should tell you how hot they run, lol.

I'm contemplating putting 2x 315w CMH in a 4x4 and doing SOG
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TheChemist77 said:
over a 5x6 area, i have 2 315 watt cmh over a 4x6 table then 5 5gal buckets on the side, should i use 3 cmh or 2 cmh and add 1 400 watt hps for adding some red to the spectrum?
Click to expand...
So this kinda gives me the idea of footprint (sounds like a technical call to Boulder Lamps is in order) and they would most likely answer this too,,,but I'm impatient.....

What did the 315w cost? This really figures, as I just put Jupiter 6 hoods (I think I got almost the last ones avail. as the guy sure gave me grief for getting all 8 I got) and 1K's in my new test and breed personal grow building......Fucking almost a year and I still have to get the HAVAC work done.....everything else is......The little temp AC's are struggling and I need that HD central unit in! By the time they get to it, I'll be needing the furnace - lol (not funny though really)...

Doc

Well you gave invites to the others so maybe this will become a CMH playground Fungi ....
 
ttystikk

ttystikk

Well-Known Member
@TheChemist77 When you call Boulder lighting, ask them what the PPFD output of their lamps is at the recommended height.

One way for companies to brag about yield is to deliberately under light the space. This gives great yield per watt numbers, but yield per square foot suffers, as does quality and maturity.

You may even go so far as to consider six of them for that space. More light means more weed, as long as you can maintain environmental control.
 
TheChemist77

TheChemist77

Well-Known Member
Dr. Who said:
So this kinda gives me the idea of footprint (sounds like a technical call to Boulder Lamps is in order) and they would most likely answer this too,,,but I'm impatient.....

What did the 315w cost? This really figures, as I just put Jupiter 6 hoods (I think I got almost the last ones avail. as the guy sure gave me grief for getting all 8 I got) and 1K's in my new test and breed personal grow building......Fucking almost a year and I still have to get the HAVAC work done.....everything else is......The little temp AC's are struggling and I need that HD central unit in! By the time they get to it, I'll be needing the furnace - lol (not funny though really)...

Doc

Well you gave invites to the others so maybe this will become a CMH playground Fungi ....
Click to expand...
i paid $500.00 per lamp, which isnt bad considering the bulb alone is $100.00 and lasts 20,000 hours without a change.. 1 315 cdl agro comes with ballast,bulb,hood,daisy chain cord for hanging multiple lamps,120 or 220 6ft cord and hangers..i ordered 2 but plan to buy more if they work as promised..boulder will say each lamp can cover a 2.8ft x 3.4ft area at 1 ft above canopy, however the study i read sais bulbs 2ft above canopy still beats the par value of a 1k hps de watt per watt also at 2ft above.. so ill place mine 2 ft above to get a larger coverage, 3x4.. the guy at boulder said at 2ft above it should replace a 600 watt hps/mh and with better production, and growth hands down wether veg or bloom..
 
TheChemist77

TheChemist77

Well-Known Member
ttystikk said:
@TheChemist77 When you call Boulder lighting, ask them what the PPFD output of their lamps is at the recommended height.

One way for companies to brag about yield is to deliberately under light the space. This gives great yield per watt numbers, but yield per square foot suffers, as does quality and maturity.

You may even go so far as to consider six of them for that space. More light means more weed, as long as you can maintain environmental control.
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im calling tomorrow, monday as they arnt in today..ill give u the answer to ppfd as soon as i find out..

also if any of u decide to purchase a lamp from boulder, if u tell them the chemist77 refered u, you can get a small discount...
 
ttystikk

ttystikk

Well-Known Member
TheChemist77 said:
i paid $500.00 per lamp, which isnt bad considering the bulb alone is $100.00 and lasts 20,000 hours without a change.. 1 315 cdl agro comes with ballast,bulb,hood,daisy chain cord for hanging multiple lamps,120 or 220 6ft cord and hangers..i ordered 2 but plan to buy more if they work as promised..boulder will say each lamp can cover a 2.8ft x 3.4ft area at 1 ft above canopy, however the study i read sais bulbs 2ft above canopy still beats the par value of a 1k hps de watt per watt also at 2ft above.. so ill place mine 2 ft above to get a larger coverage, 3x4.. the guy at boulder said at 2ft above it should replace a 600 watt hps/mh and with better production, and growth hands down wether veg or bloom..
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Sounds great, but vague. Ask for hard numbers, specifications.

By the way, the tech is from Philips- and I got lamp and ballast only kits for under $200 each, at advancedtechlighting.com. I do have to build my own fixture and wire up my own cords, however.
 
TheChemist77

TheChemist77

Well-Known Member
on the paper it says

luminous efficacy=105 lumen/watt
photosynthetic photon flux,ppf,-1.95
lumen maintenance=90%
color rendering index=92 Ra8
color temp=3,100 kelvin
operating position=universal
power conversion efficiency=93%

not sure if that helps
 
TheChemist77

TheChemist77

Well-Known Member
electronic ballast for 315 cdl agro
voltage=105/140 vac, 50/60 hz
waveform=150hz +5hz square wave
current crest factor=1.3
nominal input power=340w+5w
power factor>0.95

just called, they will be calling me back soon, ill ask the ppfd for u ty..not sure if the above answers doc's question..
 
Dr. Who

Dr. Who

Well-Known Member
WOW 1.8 amps !!! a 1K draws 9 !!!
Chem's is 1.3!!! Now I'm paying attention even more...I just might have to spring for a cpl and try them out!
 
ttystikk

ttystikk

Well-Known Member
Dr. Who said:
WOW 1.8 amps !!! a 1K draws 9 !!!
Chem's is 1.3!!! Now I'm paying attention even more...I just might have to spring for a cpl and try them out!
Click to expand...
Careful. Make sure you're comparing all your amps at the same voltage: @240, your HPS thouie is only pulling 4.2-4.8A, depending on ballast.
 
TheChemist77

TheChemist77

Well-Known Member
ttystikk said:
@TheChemist77 When you call Boulder lighting, ask them what the PPFD output of their lamps is at the recommended height.

One way for companies to brag about yield is to deliberately under light the space. This gives great yield per watt numbers, but yield per square foot suffers, as does quality and maturity.

You may even go so far as to consider six of them for that space. More light means more weed, as long as you can maintain environmental control.
Click to expand...
ty, just talked to boulder, ppfd of the 315watt agro cdl at 2 ft from bulb is 700..
what is ppfd and is 700 good?
 
TheChemist77

TheChemist77

Well-Known Member
Dr. Who said:
True, quite true.
Sadly I ran 110.....Box space vs needed outlets..
Click to expand...
doc, if u decide to try the cdl from boulder, please remember to say the chemist77 refered you.. you will get a small discount, not sure how much but even a small discount is a discount wright?
 
ttystikk

ttystikk

Well-Known Member
TheChemist77 said:
ty, just talked to boulder, ppfd of the 315watt agro cdl at 2 ft from bulb is 700..
what is ppfd and is 700 good?
Click to expand...
PPfD is a more specific version of PAR, not quite sure of the definition. 700 is definitely good, and tells me that you'll want lots of those lights because you don't want any less than that on your canopy.
 
a senile fungus

a senile fungus

Well-Known Member
ttystikk said:
PPfD is a more specific version of PAR, not quite sure of the definition. 700 is definitely good, and tells me that you'll want lots of those lights because you don't want any less than that on your canopy.
Click to expand...

If I recall correctly, it stands for photosynthetic photon flux density.

So how many photons in the PAR range are traveling through a given amount of space, per second.

Any and all, I know that's laymans terms, feel free to expand on that or correct it...
 
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