What light should I buy

dandyrandy

dandyrandy

Well-Known Member
ttystikk said:
If you lived here in Colorado, you'd find that your friends who grow would have much better weed than the dispensaries- because they're swamped with out of staters who will buy anything.
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Maybe my state go legal in November. I doubt it. I will be retiring in 14 months. I have never been to Colorado. I will visit and do some hiking. My wife and I were in Rapid City S.D. in the Air Force in the mid 70's. We never traveled there. I had James Taylor tickets at Red Rock a year or so ago and we couldn't fly out due to work.
 
P

PurpleBuz

Well-Known Member
Yodaweed said:
The light isn't the main factor in the size of the bud, the genetic is. I'm so sick of people comparing the size of the buds between hps and led, the only thing that matters is the weight of the smokable bud at the end not the girth of the nuggets, which is mainly determined by genetics. I have plants grown under LEDs that have the exact same shape/ size buds as the same genetic on a HPS only difference is the overall weight the hps gets is higher.
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actually your half right half wrong. Yes genetics determines the potential size of a cola. But that's only potential. Growing conditions determines the rest, including light.
I have seen time and time again the same strain grown under hps vs good meds, and while the hps flowers are larger, they are not as heavy as the leds. Density.
 
leroy69

leroy69

Active Member
PurpleBuz said:
actually your half right half wrong. Yes genetics determines the potential size of a cola. But that's only potential. Growing conditions determines the rest, including light.
I have seen time and time again the same strain grown under hps vs good meds, and while the hps flowers are larger, they are not as heavy as the leds. Density.
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yer i have 4 different strains same room same condition, very different in size and volume.
 
Rahz

Rahz

Well-Known Member
hellmutt bones said:
Cus u know I'm wright! Waste of good money! Ledz...u better off with CFL
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I've used both, T5 panels and DIY LED. The LED yield is 2X per watt of the CFL. There's also electrical characteristics that can be examined before building or buying a light source, and on paper my LED puts out about 2X as much light as T5 at same wattage, so it's no coincidence the yield is 2X. The cost was more than 2X but 2 years down the road it's still pulling it's weight. I've got another 3-5 years until I will need new emitters. The cost of bulbs over 5 years and CFL ends up not even being a cheap alternative.
 
hellmutt bones

hellmutt bones

Well-Known Member
Rahz said:
I've used both, T5 panels and DIY LED. The LED yield is 2X per watt of the CFL. There's also electrical characteristics that can be examined before building or buying a light source, and on paper my LED puts out about 2X as much light as T5 at same wattage, so it's no coincidence the yield is 2X. The cost was more than 2X but 2 years down the road it's still pulling it's weight. I've got another 3-5 years until I will need new emitters. The cost of bulbs over 5 years and CFL ends up not even being a cheap alternative.
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So how do you know if the bulbs are working at optimal potential now or 2 years from now? And the up-front cost is a bit much. Dont get me wrong im definetly gonna be doing LEDS but not till its more efficient and cost effective.
 
ttystikk

ttystikk

Well-Known Member
Rahz said:
I've used both, T5 panels and DIY LED. The LED yield is 2X per watt of the CFL. There's also electrical characteristics that can be examined before building or buying a light source, and on paper my LED puts out about 2X as much light as T5 at same wattage, so it's no coincidence the yield is 2X. The cost was more than 2X but 2 years down the road it's still pulling it's weight. I've got another 3-5 years until I will need new emitters. The cost of bulbs over 5 years and CFL ends up not even being a cheap alternative.
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So even with the cost of new emitters it's still less expensive over time. Me likey!
 
hyroot

hyroot

Well-Known Member
hellmutt bones said:
So how do you know if the bulbs are working at optimal potential now or 2 years from now? And the up-front cost is a bit much. Dont get me wrong im definetly gonna be doing LEDS but not till its more efficient and cost effective.
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PAR meter and radiospectrometer
 
hyroot

hyroot

Well-Known Member
hellmutt bones said:
So you need them to use leds?
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No. The par meter is how you measure photons fron any lighting or the sun. The radiospectrometer is used to measure the spectral output to make a spectrum chart.

That's how you know if the light has degraded. The amount of photons will decrease and possible spectral shift.

Say a light puts out a 1000 umole/s at 2 feet away. A year or a few years later depending on type of light and quality of light. It can be putting out 900 or 800 umole/s
 
Yodaweed

Yodaweed

Well-Known Member
dandyrandy said:
Maybe my state go legal in November. I doubt it. I will be retiring in 14 months. I have never been to Colorado. I will visit and do some hiking. My wife and I were in Rapid City S.D. in the Air Force in the mid 70's. We never traveled there. I had James Taylor tickets at Red Rock a year or so ago and we couldn't fly out due to work.
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Colorado is the shit, you gotta check out Colorado Springs, best place in Colorado in my opinion, go to Garden of the Gods. That place is amazing.
 
Rahz

Rahz

Well-Known Member
hellmutt bones said:
So how do you know if the bulbs are working at optimal potential now or 2 years from now? And the up-front cost is a bit much. Dont get me wrong im definetly gonna be doing LEDS but not till its more efficient and cost effective.
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They have projected lifespans, the same as bulbs do.

http://www.bridgelux.com/sites/default/files/resource_media/AN34_revA-Reliability-Data-for-Vero-and-V-Series-LED-Arrays1.pdf

In this case 5.7 years to 70% output... but that's running at test current and 85C. Less juice and lower temps can extend the 70% range. I'm not sure if there's math to support a projection beyond test results but if they're kept cool they should easily be good for 6-7 years, possibly much longer if driven at a low enough current.
 
ttystikk

ttystikk

Well-Known Member
Rahz said:
They have projected lifespans, the same as bulbs do.

http://www.bridgelux.com/sites/default/files/resource_media/AN34_revA-Reliability-Data-for-Vero-and-V-Series-LED-Arrays1.pdf

In this case 5.7 years to 70% output... but that's running at test current and 85C. Less juice and lower temps can extend the 70% range. I'm not sure if there's math to support a projection beyond test results but if they're kept cool they should easily be good for 6-7 years, possibly much longer if driven at a low enough current.
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This augurs well for those of us running CXB3590 at 50W instead of the nominal 100W, yes? Same goes for keeping the chip under 100F? Is there any guidance on how much the life could be extended?
 
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