Light ???

Evil-Mobo

Evil-Mobo

Well-Known Member
Straw Man said:
Weird . I have that bulb, been using it and havent seen any such issues. I used it at 18" and currently about 24".

Im limiting the exposure to a couple hours a day. However i have inadvertently left it on for a full 12.5hrs a couple times.
Click to expand...
It was my fault I left it on for two full cycles after testing for a couple of hours and did not take the bulb as seriously as I should have. All I am saying is you have to be careful it's not the bulbs fault it was on me .
 
Thorhax

Thorhax

Well-Known Member
COBs all day every day. i put them everywhere. it fits my grow style and allows me to use minimal equipment

I'm sure if @RM3 used COBs instead of T5s (you can match your same spectrum I'm sure) he would get more of a yield because there is just more light available. ~50%(cxb3590@1400ma) efficiency vs. 25% (T5 bulbs)

as i used better light my yields were drastically increasing, though i was also getting better at training and perfecting my feeding schedule.
.IMG_4166.jpg image.jpg IMG_20150110_163156609.jpg IMG_0682.JPG IMG_0480.JPG IMG_0367.jpg


i stared getting 4 ounces out of a 4x4 with about 300(china shit lights) true watts of led. my latest runs i got 19 ounces from a 3x4 area using 500 true watts(VERO291 3000k COB and 2 sgs-160s), a little over 3 pounds(low yield due to problems) from from a 4x9 area using 1200w true watts(VERO2916 3000k COB and 8 4000kCOB), 9 ounces from a 2x2 area using 200w VERO293000k COB, and 15 ounces from a 2x4 area using 400w 3500k CXB3950.


i notice i get better quality from the rooms that have more blue light in them and plants under bluer lights directly vs redder lights.
 

Attachments

ttystikk

ttystikk

Well-Known Member
Thorhax said:
COBs all day every day. i put them everywhere. it fits my grow style and allows me to use minimal equipment

I'm sure if @RM3 used COBs instead of T5s (you can match your same spectrum I'm sure) he would get more of a yield because there is just more light available. ~50%(cxb3590@1400ma) efficiency vs. 25% (T5 bulbs)

as i used better light my yields were drastically increasing, though i was also getting better at training and perfecting my feeding schedule.
.View attachment 3704493 View attachment 3704496 View attachment 3704497 View attachment 3704502 View attachment 3704500 View attachment 3704498


i stared getting 4 ounces out of a 4x4 with about 300(china shit lights) true watts of led. my latest runs i got 19 ounces from a 3x4 area using 500 true watts(VERO291 3000k COB and 2 sgs-160s), a little over 3 pounds(low yield due to problems) from from a 4x9 area using 1200w true watts(VERO2916 3000k COB and 8 4000kCOB), 9 ounces from a 2x2 area using 200w VERO293000k COB, and 15 ounces from a 2x4 area using 400w 3500k CXB3950.


i notice i get better quality from the rooms that have more blue light in them and plants under bluer lights directly vs redder lights.
Click to expand...
Fuck, dude- which part of 'he don't care about yield maximization' are you having trouble with?

Everyone gets to grow their own way, for their own reasons, to get the results THEY want. Even you. So instead of the endless harangue about yields, maybe you should ask a few questions.

Who knows? You might actually learn something.
 
RM3

RM3

Well-Known Member
ttystikk said:
Fuck, dude- which part of 'he don't care about yield maximization' are you having trouble with?

Everyone gets to grow their own way, for their own reasons, to get the results THEY want. Even you. So instead of the endless harangue about yields, maybe you should ask a few questions.

Who knows? You might actually learn something.
Click to expand...
don't understand why they don't get that I count my yields in beans 8)
 
C

churchhaze

Well-Known Member
ttystikk said:
Fuck, dude- which part of 'he don't care about yield maximization' are you having trouble with?

Everyone gets to grow their own way, for their own reasons, to get the results THEY want. Even you. So instead of the endless harangue about yields, maybe you should ask a few questions.

Who knows? You might actually learn something.
Click to expand...
Maybe you should realize that we already knew how to grow pot before RM3 showed up. You're in a trance. Snap out of it.

RM3 should be taking lessons from thorhax, not the other way around. One of them is stuck in the 80s still.
 
mauricem00

mauricem00

Well-Known Member
this debate about HIDs vs LEDs seems to be and endless circle. the led crowd seems to stick with exaggerated claims that plague that industry. based on data from cree and meanwell the actual efficiency is around 35% and not the 50-56% that some people claim. HIDs have heat problems that may make them inappropriate for a stealth closet grow.the best grow light depends on an individuals situation.
 
mauricem00

mauricem00

Well-Known Member
Thorhax said:
COBs all day every day. i put them everywhere. it fits my grow style and allows me to use minimal equipment

I'm sure if @RM3 used COBs instead of T5s (you can match your same spectrum I'm sure) he would get more of a yield because there is just more light available. ~50%(cxb3590@1400ma) efficiency vs. 25% (T5 bulbs)

as i used better light my yields were drastically increasing, though i was also getting better at training and perfecting my feeding schedule.
.View attachment 3704493 View attachment 3704496 View attachment 3704497 View attachment 3704502 View attachment 3704500 View attachment 3704498


i stared getting 4 ounces out of a 4x4 with about 300(china shit lights) true watts of led. my latest runs i got 19 ounces from a 3x4 area using 500 true watts(VERO291 3000k COB and 2 sgs-160s), a little over 3 pounds(low yield due to problems) from from a 4x9 area using 1200w true watts(VERO2916 3000k COB and 8 4000kCOB), 9 ounces from a 2x2 area using 200w VERO293000k COB, and 15 ounces from a 2x4 area using 400w 3500k CXB3950.


i notice i get better quality from the rooms that have more blue light in them and plants under bluer lights directly vs redder lights.
Click to expand...
interesting. the latest NASA spectrum is a combination of cool white (6500k) and deep red (660nm) leds.some growers are getting 1GPW using CFLs. guess there is a lot more to yield than just lighting
 
ttystikk

ttystikk

Well-Known Member
mauricem00 said:
this debate about HIDs vs LEDs seems to be and endless circle. the led crowd seems to stick with exaggerated claims that plague that industry. based on data from cree and meanwell the actual efficiency is around 35% and not the 50-56% that some people claim. HIDs have heat problems that may make them inappropriate for a stealth closet grow.the best grow light depends on an individuals situation.
Click to expand...
Your numbers are inaccurate. Actual COB LED efficiency figures are independently verifiable and they check out.

It's all in the application.
 
mauricem00

mauricem00

Well-Known Member
churchhaze said:
No he didn't. He said:



Pay attention. He's wrong. Based on the data from cree and meanwell, efficiency is how we calculate it. Not how you guess.
Click to expand...
.my calculations are based on data from cree and Maxwell they are not a guess. the math is pretty simple.would love to see your data and calculations.as well as the source for that data. numbers do not lie but salesmen do
 
C

churchhaze

Well-Known Member
mauricem00 said:
.my calculations are based on data from cree and Maxwell they are not a guess. the math is pretty simple.would love to see your data and calculations.as well as the source for that data. numbers do not lie but salesmen do
Click to expand...


http://pct.cree.com/dt/index.html

If you go to that link and put in cxb3590 and put in CB bin, for 1.4A, you get 157.8lm/W.

Using the SPD from the spreadsheet, I calculated LER of 3000k 80cri is 327.69lm/W.

Radiant efficiency = (157.8lm/W) / (327.69lm/W) = 48.2%

I calculated 96.6% of the digitized SPD to be within 400nm-700nm. That means that at 1.4A, it has a PAR efficiency of 46.5%. (not 35%)

show.jpg

The digitization I did wasn't perfect obviously, but I get the same LER as almost everyone else who's calculated it. (327-328lm/W)
 
mauricem00

mauricem00

Well-Known Member
churchhaze said:
Bullshit. Show how you came up with this number. Why does everyone think they can just make up numbers? The data from CREE is where get our numbers from.

(btw, this thread is mostly about T5 vs HPS)
Click to expand...
the charts are there run the numbers yourself. maxwell drivers operate at 90% efficiency at the current range being used
 

Attachments

C

churchhaze

Well-Known Member
mauricem00 said:
the charts are there run the numbers yourself. maxwell drivers operate at 90% efficiency at the current range being used
Click to expand...
It's mean well drivers, and the efficiency of the driver is independent from the efficiency of the leds.

To find total efficiency of your entire lighting setup it's: total efficiency = radiant efficiency * driver efficiency.

My mean well drivers are 94% efficient, however that's irrelevant at finding the efficiency of the cobs.
 
C

churchhaze

Well-Known Member
Radiant efficiency = luminous efficacy of source / luminous efficacy of radiation (LER)



Since they only give you lumens and don't give you LER, you have to calculate it yourself. That's where digitizing the spectrum is needed. Many members of RIU have independently calculated LER of these spectrum and have come up with the exact same result.
 
Last edited:
You must log in or register to reply here.
Top