Are LED's practical for a grow room? (24 ft x 12 ft)

[SPLFreak808]

Who's running them as high as 1 k?

Many online grows. It is talked about all the time in club 600. You can have your plant 15" away with 1kw, or 12" away with a 600. Its harder to dial in a 600w because of the high radiant energy at a low wattage. Honestly though i dont own a 600, and am a horrible grower lol. My good friend is right behind me with his harvest of the other half of clones i bought, hes getting 22-26 ounces in a 4x4 while im getting 38ounces max per 5x4. Im starting to think if i bought two 600's my yield will go up. But i need more practice with organics before even thinking about yield. I will compare our harvest again in a few months as we doubled up on the same clones again.

 

[Darth Vapour]

I have run 1k's 15 - 18 " from tops open reflector with no light bleaching ,, as long as you got sufficient air movement , and fans blowing inbetween light and canopy your laughing but the truth is 1 k 18 - 25 " away from canopy is going to throw down the Photons / par.. the same
with a 600 every 8 " further away you go it drops drastically

 

[SPLFreak808]

I have run 1k's 15 - 18 " from tops open reflector with no light bleaching ,, as long as you got sufficient air movement , and fans blowing inbetween light and canopy your laughing but the truth is 1 k 18 - 25 " away from canopy is going to throw down the Photons / par.. the same
with a 600 every 8 " further away you go it drops drastically

Where can i educate myself on this? HPS and par output?

 

[REALSTYLES]

I have run 1k's 15 - 18 " from tops open reflector with no light bleaching ,, as long as you got sufficient air movement , and fans blowing inbetween light and canopy your laughing but the truth is 1 k 18 - 25 " away from canopy is going to throw down the Photons / par.. the same
with a 600 every 8 " further away you go it drops drastically

Sent from my SM-G900P using Rollitup mobile app

 

[a mongo frog]

Where can i educate myself on this? HPS and par output?

Light management bro. Key to gardening.

 

[bicit]

This thread has become a bit of a circle jerk. Kinda feel bad for the op.

 

[REALSTYLES]

This thread has become a bit of a circle jerk. Kinda feel bad for the op.

It's my fault when ever I post there's mayhem lol.

Sent from my SM-G900P using Rollitup mobile app

 

[OneHitDone]

Go out of town for one night and miss all the excitement lol

Hopefully I can still get the answer from someone on this -
Lets say a situation similar to that DE vs Spider vid

DE hung at 36" to get a specific intensity reading
LED set at height with same reading (18")?

Now, move the light meter down in 6" increments and what is the reality of the readings on each as they increase distance from the source?
Would the LED drop off faster or the same from an already established intensity point?

 

[SPLFreak808]

Light management bro. Key to gardening.

Actually, i was asking if anyone has any par readings from an HPS/SHPS. I have been using x3 400watt hps's for 3 years already. Just this january i changed them all to 1000watt SHPS. So far i could only pull a tad over 2 pounds and they were vegged long (bd short)and healthy as fuck, yet people on this forum are pulling almost 3 fucking pounds per 1kw so i just need to start looking into "par" values to step my game up.

 

[Rahz]

This thread has become a bit of a circle jerk. Kinda feel bad for the op.

A lot to read, but I think everyone got their opinions across on the matter. I think I was able to show that cost over 6 years would be similar...

From there it's just a matter of having prior results to justify the move...

I for one would be unwilling to sink 12 grand into a light setup I'd never used before. I'd go with the cheap and proven technology, and play with LED on the side.

 

[a mongo frog]

Actually, i was asking if anyone has any par readings from an HPS/SHPS. I have been using x3 400watt hps's for 3 years already. Just this january i changed them all to 1000watt SHPS. So far i could only pull a tad over 2 pounds and they were vegged long (bd short)and healthy as fuck, yet people on this forum are pulling almost 3 fucking pounds per 1kw so i just need to start looking into "par" values to step my game up.

just remember some people stretch the truth a little. Id say your doing real well getting a little 2 per lamp.

 

[SPLFreak808]

There really is no right or wrong in this thread. If people take the time to read they will figure out what better suites them. All bullshit aside 1000watts of any diode/gas bulb will yield for sure.

 

[Abiqua]

Go out of town for one night and miss all the excitement lol

Hopefully I can still get the answer from someone on this -
Lets say a situation similar to that DE vs Spider vid

DE hung at 36" to get a specific intensity reading
LED set at height with same reading (18")?

Now, move the light meter down in 6" increments and what is the reality of the readings on each as they increase distance from the source?
Would the LED drop off faster or the same from an already established intensity point?

This could tell
MQ-306: Line Quantum with 6 Sensors
Sensor Dimensions
50 cm length, 1.5 cm width, 1.5 cm height

 

[SPLFreak808]

just remember some people stretch the truth a little. Id say your doing real well getting a little 2 per lamp.

its actually a bitch for me. i have to tie down, supercrop , top , repeat...and its only 4 plants per kilowatt. im not a legal grower so getting shit right is a big must for me. i have a fuck ton of clones ready to experiment with.

 

[SPLFreak808]

This could tell
MQ-306: Line Quantum with 6 Sensors
Sensor Dimensions
50 cm length, 1.5 cm width, 1.5 cm height

that is real deal shit if someone wanted an actual reading. as far as reading intensity loss it could be done through a cell phone sensor but i highly doubt the actual reading will be correct, you can still see where it gets cut in half.

 

[SupraSPL]

A 1000W 42% efficient prefab COB lamp ($2200) will crush a 42% efficient 1000W DE ($500) in yield, but clearly not in up front cost. Hopefully that answers your question OP.

We don't normally recommend 1000W of COB in a 4X4 because that would result in 23.6 PAR W/ft² or 1180 PPFD averaged, with some hot spots at or above 1500PPFD most likely. I run with about 650W of COB in each 4.5X4.5 or about 750 PPFD averaged. Nug size is right where I want it. Yield 1.5 to 1.9 unts for mid yielders, top shelf, in soil. Yield is important to me but quality comes first.

Here are some decent yielding ladies that did not make the cut due to inferior quality. The lady on the right, Purple Chem was a keeper but not a great yielder.


A brand new bulb/reflector 1000 HPS DE in a 4X4 results in 20 PAR W/ft² or 990 PPFD averaged, still a bit higher than I prefer, more uneven spread, lopsided spectral distribution and an 825nm infrared heat spike, resulting in warmer canopy temps. Higher canopy temps will increase photosynthesis and weight on the scale, somewhat making up for the reflector losses, but will it increase cannabinoids and terpenes as well? That is the end goal after all.

HID heavily depends on reflectors because the output is in a 360 degree globe. The reflector cannot be cleaned and loses efficiency over time. Jair from Gavita recommends replacing the reflector along with the bulb to maintain output.

Overall, it is clear that 1000W DE is a much lower up front cost. But that advantage is reduced quickly when all the other things are taken into consideration such as AC, ventilation/filtration, nug quality, bulb replacement costs, and direct electrical costs.

The COB advantage will continue to grow. Jair from Gavita pointed out that HPS has made small efficiency gains in recent years and he expects more small efficiency gains in the coming years. Meanwhile, commercial COB lamps are suddenly topping 40% efficiency and DIYers are building 63.8% efficient flower lamps, 70% efficient vegging lamps. That represents a ground breaking reduction in heat and gradually commercial COB fixtures will push that direction and or get cheaper.

Jair from Gavita, guest on Adam Dunn

 

[AquariusPanta]

A 1000W 42% efficient prefab COB lamp ($2200) will crush a 42% efficient 1000W DE ($500) in yield, but clearly not in up front cost. Hopefully that answers your question OP.

We don't normally recommend 1000W of COB in a 4X4 because that would result in 23.6 PAR W/ft² or 1180 PPFD averaged, with some hot spots at or above 1500PPFD most likely. I run with about 650W of COB in each 4.5X4.5 or about 750 PPFD averaged. Nug size is right where I want it. Yield 1.5 to 1.9 unts for mid yielders, top shelf, in soil. Yield is important to me but quality comes first.

Here are some decent yielding ladies that did not make the cut due to inferior quality. The lady on the right, Purple Chem was a keeper but not a great yielder.
View attachment 3423727 View attachment 3423728

A brand new bulb/reflector 1000 HPS DE in a 4X4 results in 20 PAR W/ft² or 990 PPFD averaged, still a bit higher than I prefer, more uneven spread, lopsided spectral distribution and an 825nm infrared heat spike, resulting in warmer canopy temps. Higher canopy temps will increase photosynthesis and weight on the scale, somewhat making up for the reflector losses, but will it increase cannabinoids and terpenes as well? That is the end goal after all.

HID heavily depends on reflectors because the output is in a 360 degree globe. The reflector cannot be cleaned and loses efficiency over time. Jair from Gavita recommends replacing the reflector along with the bulb to maintain output.

Overall, it is clear that 1000W DE is a much lower up front cost. But that advantage is reduced quickly when all the other things are taken into consideration such as AC, ventilation/filtration, nug quality, bulb replacement costs, and direct electrical costs.

The COB advantage will continue to grow. Jair from Gavita pointed out that HPS has made small efficiency gains in recent years and he expects more small efficiency gains in the coming years. Meanwhile, commercial COB lamps are suddenly topping 40% efficiency and DIYers are building 63.8% efficient flower lamps, 70% efficient vegging lamps. That represents a ground breaking reduction in heat and gradually commercial COB fixtures will push that direction and or get cheaper.

Jair from Gavita, guest on Adam Dunn

Looks like it's just you and me on this one, Supra...

 

[Yodaweed]

Here's a chart to show distance you can put your HID light from canopy.

 

[OneHitDone]

Go out of town for one night and miss all the excitement lol

Hopefully I can still get the answer from someone on this -
Lets say a situation similar to that DE vs Spider vid

DE hung at 36" to get a specific intensity reading
LED set at height with same reading (18")?

Now, move the light meter down in 6" increments and what is the reality of the readings on each as they increase distance from the source?
Would the LED drop off faster or the same from an already established intensity point?

I guess my question isn't quite understood. I'm not sure how else to phrase it more clearly.

The same intensity can be reached with COB and HID based on how close the canopy is to the source. But once that distance is increased does the led fall of faster than the HID? Is there some sort or "strength" element to the blasting photons coming out of the light source?

 

[AquariusPanta]

I guess my question isn't quite understood. I'm not sure how else to phrase it more clearly.

The same intensity can be reached with COB and HID based on how close the canopy is to the source. But once that distance is increased does the led fall of faster than the HID? Is there some sort or "strength" element to the blasting photons coming out of the light source?

I'm not big on absolute values and comparisons. It all really depends on what HID and COB technology you're using, if lenses or reflectors are being implemented; there's so many differences between using COBS and standard lighting methods that it's really hard to compare the two approaches.

That being said, there is no possible absolute answer to your question and why ask such a skinned question if there is no absolute answer?