Light Intensity; LED vs HID

hillbill

hillbill

Well-Known Member
Flat canopies and cobs, either naked or with reflectors are a great combo and with multiple cobs, eliminate shadows and even seem to keep leaves green further down as well.

Note: In a former life I thought lenses were the way to go with cobs but too many results here at RIU suggested I might have been talking like a man with a paper ass. I was.
 
OneHitDone

OneHitDone

Well-Known Member
So is the consensus still after all this that if you want to grow great big Dank Tree's like Remo does, cobs are not going to get it done and stick with hps?
 
dbkick

dbkick

Well-Known Member
OneHitDone said:
So is the consensus still after all this that if you want to grow great big Dank Tree's like Remo does, cobs are not going to get it done and stick with hps?
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HID. That includes a variety of lighting. HPS is bullshit and is about to change a bit though.
 
dbkick

dbkick

Well-Known Member
OneHitDone said:
HPS is bullshit :lol:

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I've seen that video and wondered wtf those lamps are , I'm hearing impaired and the captions are iffy but I don't see him mention what lamps those are.
They don't appear to be conventional hps unless there's some sort of filter on the camera.
 
OneHitDone

OneHitDone

Well-Known Member
dbkick said:
I've seen that video and wondered wtf those lamps are , I'm hearing impaired and the captions are iffy but I don't see him mention what lamps those are.
They don't appear to be conventional hps unless there's some sort of filter on the camera.
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You gotta be kidding bro, this your first time around the block?
 
C

churchhaze

Well-Known Member
RM3 said:
I grow donkey dicks with T5's, like I said earlier plants don't do math. When growers start to learn .. Then LED's will make da donkey dicks.
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You really think you're ahead of the curve?...

...when we're already pulling way better yields than you...?

Your T5's might overlap.... but they're 25% efficient and yield like shit. You should try HPS or LED.
 
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BM9AGS

BM9AGS

Well-Known Member
Hybridway said:
That's awesome! I'm Jelly!!!
Is that a wall to wall light in a tent?
If you go up 12w a cob on those sinks then they require fans & you'll be good?
I ask cuz I've seen pre made kits n they come w/ pin sinks made to handle a certain amount passively. But add the fans & you can crank em up some?! That makes me want to try even more. Cuz I wanna run em hard & was wondering how if their in a kit made to run soft.
Is this your first cob light & grow?
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I have a go green LEDs 4 cx?3070 grow light so, not first.

I have 4 of the timber 4 cob kits. So yes it's passive and designed to run at ~50 watts each cob. Right now the circulating fans feel the heatsinks warm to very cool at full power on the cobs. So of course actively cooling them would allow me to add much more wattage not just 12, I'm sure I could push them to 100 watts each with individual heatsink fans.

Most of the much respected cob guys speak of lowering the wattage and some say that above 750 PPFD is too much. So for me at 50 watts that makes 800 PPFD in a 5x5' room. So after this grow likely I'll learn what the respected guys already know and preach......but I need to learn for myself....I'm a little insane that way....

As for the timber kits.....if you add it all up I'm not sure how timberDan is making a business out of this.....he's not marking them up much, and for his impressive build quality I feel like I'm stealing from him.

But say after experience with this light I decide I want more power.....I can always switch out to a 1750b driver like air walker has and I'll still always be able to dim down all the way to 8 watts per kit. Of course I'd want active cooling to do this. I think the pin sinks state up to 61 watts passively.
 
BM9AGS

BM9AGS

Well-Known Member
RM3 said:
Nope, never saw a curve, I'm a forward, never straight kinda guy
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Woah.....outta the closet you come. J/k!!

Applying the inverse sq law you could still grow large colas under floro.....you'd simply just need the plant boxed in by floro on top and sides and maybe 1-2" from plant.
 
testiclees

testiclees

Well-Known Member
hillbill said:
Flat canopies and cobs, either naked or with reflectors are a great combo and with multiple cobs, eliminate shadows and even seem to keep leaves green further down as well.

Note: In a former life I thought lenses were the way to go with cobs but too many results here at RIU suggested I might have been talking like a man with a paper ass. I was.
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"paper ass" holy fuck dude I havent heard that shit since my old boy passed LOL SFH
 
OneHitDone

OneHitDone

Well-Known Member
weed-whacker said:
isnt it strange how this debate goes on and on and on yet there is no mention of the fact that the HPS in these tests diminished in intensity at almost the same rate as the LEDs(suggesting that having multiple light sources closer to the canopy is going to get the best penetration)

AND the fact that the illumitex fixture showed very little loss of ppf while distance was increased (optics people)and blew the others away completely in that respect has not been mentioned at all?

growers house also have a test which demonstrates this- watch the vid
http://growershouse.com/blog/illumitex-neosol-ds-led-grow-light-review-test/

http://growershouse.com/images/PDFs/chart_neosolDS.pdf

not to mention all these fixtures(other than the illlumitex) are single source light points(ok the monons are multiple but still packed into a small area, not spread out as we do with our cob builds) and measuremenst were taken directly below the light source



so if anything the take away from that vid should be to use spread out light sources with optics for even ppfd and good penetration


the illumitex chips run at 5w each and convert to 1.7 umols per watt
cobs we run 50w each convert at around 2.5 umols per watt

DE is 1.7 also?
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The par #'s on the illumitex I believe stay fairly consistent as you move away from the panel because you are entering the region where all the beam angles from the individual chips are overlapping. I bet that panel would kick ass for veg and growing lettuce etc. but as @Hybridway has been pointing out - that panel doesn't crank out the intensity for flowering
 
BM9AGS

BM9AGS

Well-Known Member
cdgmoney250 said:
So... hearsay of what somebody else on the Internet says holds more merit than you measuring something with a meter??o_O

Mind = Blown

If you would do this simple task, you would have answered your own questions.

I give you this to read over in the mean time.

https://en.m.wikipedia.org/wiki/Photon
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Hey brother. I took the time to read all of your links... Honestly, have you even read them? Nothing in there discredits what I've written here!

I'm speaking of an ideal intensity/density. Which in fact can be measured via PPFD. Higher PPFD is ideal and higher PPFD is closest to the source of light. Unless using a lens then it's at that lenses focal point.

No where in your posts have you explained how you're so right with well articulated writing, mostly links and speaking in presuppositions which I do not follow. I think if you knew all of your links you posted inside and out you'd post a valid argument because I found one in your links which no ones referenced and tho it is applicable it's not applicable to intensity/density.

So unless PPFD doesn't matter then I see nothing that disproves my writing
 
BM9AGS

BM9AGS

Well-Known Member
OneHitDone said:
So is the consensus still after all this that if you want to grow great big Dank Tree's like Remo does, cobs are not going to get it done and stick with hps?
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Can't speak for the others but my consensus is......sort of. Haha. Guys are now testing the bigger cobs and those will in fact have more ass to them than the smaller ones were playing with like cxb 3590.... So once IMHO those are over grows then the hid world will begin its demise........
 
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