How deep do your LED's penetrate?

[thenotsoesoteric]

Sorry but I haven't seen anyone here on riu or in real life to get big ass colas like this off 600w of cob or led. Then again I haven't searched through the led section much but enough. And quality was as good as anything I've seen from hid or led

 

[see4]

His original statement was that 180watts of led replaces 350watt of hps....

Something you want to back to....?

i wouldn't go that far, but i'd say that if you are a good grower, you could pull close to 2gpw under LED and maybe 1.5gpw under HPS. so 250 watts of LED could potentially outperform 350 watts of HPS, maybe.. if you're lucky.
so i'd say the claim isn't too far fetched, but i highly doubt 180 watts led could outperform 350 watts hps... but may be possible in the near future.

 

[Lucky Luke]

i wouldn't go that far, but i'd say that if you are a good grower, you could pull close to 2gpw under LED and maybe 1.5gpw under HPS. so 250 watts of LED could potentially outperform 350 watts of HPS, maybe.. if you're lucky.
so i'd say the claim isn't too far fetched, but i highly doubt 180 watts led could outperform 350 watts hps... but may be possible in the near future.

under a single light source id agree with this.

 

[sunny747]

Well, that escalated quickly...

 

[Dynamo626]

I cant find any thing on a 180w cob, here in info on a 550w cob par charts and spectral information also. Here the numbers are 1000w gavita de vs a 550 cob. Very simular numbers. If a 550 replaces a 1000w hps then wouldnt 275w replace 500w hps?
http://www.cree.com/led-components/media/documents/HorticultureReferenceDesign.pdf

 

[coreywebster]

Well, that escalated quickly...

Ah its been a while since the last time. Nice to know we are all still here..

 

[Dynamo626]

Again im not a fan of cobs they are great but way to expensive. It would take years to recover the price in electric savings

 

[coreywebster]

I cant find any thing on a 180w cob, here in info on a 550w cob par charts and spectral information also. Here the numbers are 1000w gavita de vs a 550 cob. Very simular numbers. If a 550 replaces a 1000w hps then wouldnt 275w replace 500w hps?
http://www.cree.com/led-components/media/documents/HorticultureReferenceDesign.pdf

Well HLG say the 260w QB kit (285 wall watts) produces the same output as 500w hps (if they existed)
No way of testing it myself but I have seen the results plenty of times to back that up..

Pounds coming out of your ears. £££££

(when I say seen the results, I mean I have grown, chopped, dried, cured the results)

 

[jarvild]

I'm aware of that. And I do. You still end up missing a few, especially deeper in the room. For perspective, I pull two and a half pounds out of one room, and three and a half out of the other, with maybe an ounce of that being larf.

Nice, how many watts in your rooms?
I can pull almost 2 units in a 4x4 with a single ended 600 hps.

 

[coreywebster]

@jarvild
Yes we know, your pretty good with the numbers.
I can pull 2lb from a 4x4 with 570w of QB and most of the time less than an oz of larf (not included in weight)
I don't have a picture though, so I'm going to use yours.

 

[Dynamo626]

Lol

 

[Dr. Who]

Bullshit. I have a friend with a warehouse spot that runs 2 dozen 1000w DEs over 6 footers, and he has larf on the bottom foot or two of his plants. This has nothing to do with light penetration - it's called apical dominance.

I run a DE 750(along with 315s) over 5 foot plants, and even the plants directly under the DE have larf on the least developed branches. But no more or less than my cob/pcb setups. I would actually say I possibly get less larf using LEDs due to the spread, as opposed to a single light source.

Absolutly correct. 180W cob replaces abought 350w hps so yes the 400w hps produced a lil better. Penitration depends on light intensity. 400W or its equivlent (cobs in your case) penitrates abought a foot. 600W hps/315 cmh/300w cob will do abought a foot and a half. 1000W hps/ 550 cob/ 630 cmh 2 feet.
King...1000w de hps/ 660 cob/ 990 cmh while running co2 2.5 foot colas for the comerical harvest

You guys, good grief!

Johnny, chances are your buddy has the lights spaced out to far between centers. He may not be lolllypopping enough, or running tight strains with little light flow from top to bottom (back to the lollypop trimming). Can you get "larf" from DE HID use...Sure, why not? Can you reduce and/or eliminate it. Sure, why not?

By the way. Truth be told. Lower buds do not "need" light to develop or grow....They do ripen a whole lot better with it....

Dyna, The use of HID in large plant, commercial growing will hold the crown for quite awhile yet. LED just does not have the effective depth penetration that full power DE HID does. Even simple 1K's will beat them.
Cobs rule the shorter plant, flat canopy commercial grows. Just look at the multi level shelf systems being used in some commercial ops. Here your maximizing space, using less power and creating less heat in an environment that needs those attributes.

As far as gassing in a warehouse size grow....Why? Your going to hit cost to return limits that make gassing a less then optimal choice....One boo boo at those Temp and RH levels could bring on a major crop loss. Think PM and/or root problems....to name a cpl possibilities...

 

[Dr. Who]

whaaa?? 2 1/2 gallon pots? and you are growing those size plants? dang dude. you got growing dialed in good.

That's actually easy to do.....Feed the plant what it needs....

 

[Dr. Who]

That's a silly statement. There are several grows here on RIU that have grown better gram-per-watt with LEDs than with HPS.

Really? So what? GPW is not a way to measure ability.....Nor judge it!

250w HID in a 2x2 space
specific strain (Greenthumbs G-13)
SOG
Flood and drain
Hesi hydro nutrients. (ROOTS and SUPERVIT changed to Kelp extract)
4 inch Rockwool cubes = 35 plants
Bloomed at about 8 inch's
32 grm average per
1120 gr
4.48 gr per watt
Cramped, but solid, massive mains, trimmed to 4 lowers and those where trimmed to just the mains on them.

Took a cpl of tries to do it.....Just to see what could be done...

Now the thing same with 64 plants. Plant warrior #1's in a 4x4 with a 600w HID
Soil
Hesi soil nutrients - same changes
Same average.
2048 gr
3.14 gpw

To me, GPW is a meaningless way to measure, other then an indicator of total system dial in.

I can't run that kind of plant count anymore....Legal is beyond important... So, large plants under HID, with optimal light spacing (1K's at 6 ft centers). I still do near 2 gpw on average. That is respectable and cost effective....

If your doing over 1 gpw. Be happy!

 

[tyke1973]

View attachment 4097679
# mainline/supercrop

There's a pollen sack on your plant

Thanks for that dude,Just went up and checked them ,it was the start of a pollen sack,Not no longer down they come .They have had a full 8 week and was there ,just me trying to push them more ,But had a real good look around the others and no damage,so far .The Cookie Kush has been pulled from under the hps and put under the led,for a while till its done,to be honest i thought that would have been the first to be done,I say it needs at least another 12/14 days.That Supe haze will easy do a lb heavy and the G13 Blueberry Headband ,both beautiful flowers. The Cookie Kush looks great too,But not sure if Changing lights half way through will have a bad effect on it or good ,But bud looks really nice.Just that Holy Crap ,i should have ditched it earlier to be honest.I'm not saying its a bad strain,because i only popped the one seed of each strain,They was all free from attitudes promo's.So can't really Grumble.Just happy i can get my Pineapple Express and strawberry glue in there now,well once these have dried.

 

[see4]

That's actually easy to do.....Feed the plant what it needs....

Of course, but I've never seen plants that size coming from 2 gallon pots.

Pictures may be deceiving, but the pots shown don't look like 2 gallon pots. More like 5 or 7 gallon.

For me, 2 gallon bags mean scrog. 5-7 gallons mean a couple of 3 footers... But that's me, there are much better growers out there than me.

 

[see4]

Really? So what? GPW is not a way to measure ability.....Nor judge it!

250w HID in a 2x2 space
specific strain (Greenthumbs G-13)
SOG
Flood and drain
Hesi hydro nutrients. (ROOTS and SUPERVIT changed to Kelp extract)
4 inch Rockwool cubes = 35 plants
Bloomed at about 8 inch's
32 grm average per
1120 gr
4.48 gr per watt
Cramped, but solid, massive mains, trimmed to 4 lowers and those where trimmed to just the mains on them.

Took a cpl of tries to do it.....Just to see what could be done...

Now the thing same with 64 plants. Plant warrior #1's in a 4x4 with a 600w HID
Soil
Hesi soil nutrients - same changes
Same average.
2048 gr
3.14 gpw

To me, GPW is a meaningless way to measure, other then an indicator of total system dial in.

I can't run that kind of plant count anymore....Legal is beyond important... So, large plants under HID, with optimal light spacing (1K's at 6 ft centers). I still do near 2 gpw on average. That is respectable and cost effective....

If your doing over 1 gpw. Be happy!

I never said gpw was a measure of ability. Those are your words.

To me, GPW is a measure of light quality when all else is equal. And I would agree, beyond that, gpw is a fairly meaningless statistic.

Of course there are varying environmental variables that will change the outcome of a grow. I was speaking strictly in terms of light quality/output.

 

[jarvild]

Of course, but I've never seen plants that size coming from 2 gallon pots.

Pictures may be deceiving, but the pots shown don't look like 2 gallon pots. More like 5 or 7 gallon.

For me, 2 gallon bags mean scrog. 5-7 gallons mean a couple of 3 footers... But that's me, there are much better growers out there than me.

2 1/2 gallons of coco coir DTW if you want to call it that as I don't feed to run-off much anymore.

 

[jarvild]

@ Dr. Who, How do you like Dr. Greenthumbs G-13 ?

 

[Kingrow1]

Too many noobs humping cob leds thinking half the amount equals the same yeilds as hps....

Baaahaaahaaaha learn to grow....!