Led strip build

welight

welight

Well-Known Member
So there are several things to consider and these is some confusion about specs, let me drop into point mode for a moment
  1. single die or single chip UVB/C are typically quite low in output, the best I know is the Nichia 280nm chip at 55mw, NCSU334A
  2. Radiant energy output (mwatt or watt)is not to be confused with led drive power(Watts)
  3. there are several suppliers of multi die leds, Seoul, LG etc that have higher radiant energy but these are just multiples of single die performance or like a board that has several single die chips
  4. people like Migro make comments about longevity of UVC/B but dont provide context in terms of what that is. Like any led and more so with UV you need to consider the type of PCB you will attach to, drive characteristics, is the led it self constructed in materials that will degrade under long term operation, how long should you have the UV led on for, its is unlikely to be for hours at a time, so 10000 hours on a UVB/C is likely to be a long time
  5. what material considerations, you need a quartz lens to both allow passage of UV Light without destroying the lens or in fact using any secondary optical material that will allow the passage of UVB/C
  6. Most all UV (single die)leds are typically in the 6-8 forward voltage range.
  7. Cost of UVB/C is significant relative to normal leds. I can make a 2ft 3030 led board with 112 pcs of 3030 UVC but it would be $2000.00, so judicious use is both required from a morphology and cost perspective
just my current list of consideratons
 
Airwalker16

Airwalker16

Well-Known Member
welight said:
So there are several things to consider and these is some confusion about specs, let me drop into point mode for a moment
  1. single die or single chip UVB/C are typically quite low in output, the best I know is the Nichia 280nm chip at 55mw, NCSU334A
  2. Radiant energy output (mwatt or watt)is not to be confused with led drive power(Watts)
  3. there are several suppliers of multi die leds, Seoul, LG etc that have higher radiant energy but these are just multiples of single die performance or like a board that has several single die chips
  4. people like Migro make comments about longevity of UVC/B but dont provide context in terms of what that is. Like any led and more so with UV you need to consider the type of PCB you will attach to, drive characteristics, is the led it self constructed in materials that will degrade under long term operation, how long should you have the UV led on for, its is unlikely to be for hours at a time, so 10000 hours on a UVB/C is likely to be a long time
  5. what material considerations, you need a quartz lens to both allow passage of UV Light without destroying the lens or in fact using any secondary optical material that will allow the passage of UVB/C
  6. Most all UV (single die)leds are typically in the 6-8 forward voltage range.
  7. Cost of UVB/C is significant relative to normal leds. I can make a 2ft 3030 led board with 112 pcs of 3030 UVC but it would be $2000.00, so judicious use is both required from a morphology and cost perspective
just my current list of consideratons
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Okay. Good to know... Still waiting on some kind of answer on implementation and if this is enough for a 4x4 space? Also, wouldn't this be much better on a 2' or 4' strip, same diode count, just spread out?
Also, what drivers would you say are best matches for these. XLG-150-L for both channels?
 
welight

welight

Well-Known Member
Airwalker16 said:
Okay. Good to know... Still waiting on some kind of answer on implementation and if this is enough for a 4x4 space? Also, wouldn't this be much better on a 2' or 4' strip, same diode count, just spread out?
Also, what drivers would you say are best matches for these. XLG-150-L for both channels?
Click to expand...
Sorry did you mean a single board, no I would suggest 2-3 boards will be required, so driver need would be based on that
Cheers
 
Airwalker16

Airwalker16

Well-Known Member
welight said:
Sorry did you mean a single board, no I would suggest 2-3 boards will be required, so driver need would be based on that
Cheers
Click to expand...
So your 285mm UV boards with the 6 each of 280/310 you'd need 3 boards to cover a 4x4? What's this about then at the very bottom from your website?Screenshot_2020-03-14-10-28-03.png
if 0.5w per sq foot, in a 4x4 tent, the canopy is usually at least 3' up leaving only a 4x4x3' = 48 cubicft of space but the canopy itself is only 16 sqft. You're saying its the PHOTONIC watts you're using? So because it's 12.5, you'd need 3-4?
and if that's the case, you'd almost HAVE TO spread them out over a 4' strip and use 3-4 spread across your ceiling?
 
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nachooo

nachooo

Well-Known Member
George2324 said:
I’ve found this model on alibaba quite cheap

SETi/Seoul Viosys CUD8AF4C


Im thinking of building a strip one per sqft of far red leds that turn on at the end of day, and have a single UV 1w diode in the middle that’s on all day.

that should work out good
Click to expand...
The link you send is about a led that is 275nm..this is a very short wavelenght..very dangerous to you and the plants...You should look for leds that have 285-310nm... The 280nm ones are easy to find and cheaper..but in my opinion in also dangerous cause what you really need is in 285nmk and 310 nm mostly...a 280nm could damage the plant and your eye ten time more than a 285nm...
Please do not use a 275nm led in any case...
 
nachooo

nachooo

Well-Known Member
Airwalker16 said:
There's quite a lot of options surprisingly on eblay that I saw just searching 280 UV led
Click to expand...
A 280nm led is not the correct led to use... You should look for 285nm and if not avalaible better 295,300,310 nm..but never going lower wavelenghts than 285nm cause danger of the UVB increases a lot..and you need 285nm and no less wavelenght... in fact some sellers have UVB led fixtures with 280 nm leds cause they are cheaper than the 285 ones and above....This should be avoided! Never use 280 nm leds and below...Plants will suffer, your health too... Even using 285 nm needs caution...
There are lot of info in this forum about what I am talking about...
Ihave used 60 mw of output power , 1 square meter area , 3,5 hours a day and in the next crop I had to low the dose to 2,5 hours cause I was adding too much UVB and new strains do not tolerate such levels..
And a final advice...when dealing with UVB...never trust alibaba or ebay sellers....never trust exotic chinese datasheets...this are not inocent warm white leds...that if its datasheets are wrong nothing can happen to your eyes and skin.....You should look for this kind of leds in sellers that you can trust..like digikey , mouser etc...and of course good led makers...not from a strange unknow alibaba factory ....
 
nachooo

nachooo

Well-Known Member
And again..regarding 285nm..this was the most eficient and reliable led in the market....at least until end of 2019....
https://www.neumueller.com/datenblatt/seoulviosys/CUD8GF1B_R1.0 (285nm_CA3535).pdf
Avoid 280nm ones..you dont need such a low wavelenght...is an error and dangerous to use it and the cannabis UVR8 receptors peak at 285nm...not 280nm....Of course a 280nm led gives some 285nm..but also gives a lot of much more dangerous wavelenghts....If I will find a 300nm one..at good efficiency and prize, I will change my 285nm...but I have not find it yet
 
M

Mrgoodsusa

Member
George2324 said:
So I have saved myself a fortune. It turns out I can use my 36b drivers I already have.

So I now intend to buy 528 Samsung f series 56mm 3000k strips and use with 12 HLG-600H-36b drivers.

Each driver would put out 384w for a total of 4609w to cover approximately 130sqft of canopy.

Each individual strip would have 8.72w and around 35 per sqft.

My plan is to mount these strips without a heatsink do you think the wattage per strip is low enough to achieve this?

I will have 6000m3 of air being sucked out of my room into a cooling room and recirculated back into the room creating a negative pressure so I’d think that would count as “active” cooling?
Click to expand...
hi is this for flower only?why do use3k only ?thanks
 
Orb

Orb

Active Member
Yes it what's used in the f series gen3 although most 3k 80cri should have a similar spectrum
 
G

George2324

Well-Known Member
Orb said:
Yes it what's used in the f series gen3 although most 3k 80cri should have a similar spectrum
Click to expand...
Great cheers.
That’s exactly the sprectrum I wanted for my room then. Got my 528 strips just havnt got round to finishing the room design yet.

Trying to design a strip 60cm long with far reds all the way along the strip and 1 UV led in the middle.

just havnt found any conclusive evidence of the best led to use for uv yet
 
Orb

Orb

Active Member
I've only ever used Arcadia T5s for UV but looks like you're in good hands for UV, I'd be more worried the UV would diminish before the far reds, I wish you well with it though
 
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