Whats new LED growers

ChiefRunningPhist said:

Its a tight grouping of 280nm chips imo. Erythemal weighting factor is greater than 1 at 280nm if you extrapolate. UVI is the quotient of the er

One of the growers here, @nachooo was maxing his tolerance at 60mW/m2 (4 chips equally spaced about 1m2) of 280nm at a duration of ~3.0hrs - 3.5hrs a day if I'm not mistaken.

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So at over 500mW in almost a 5x5, I shouldn't need them turned on very long

Strips will be here soon, but I don't even have anything in flower at the moment. I have a few girls that will be going into flower in the few weeks, so it could be awhile before i can show anybody results.

fragileassassin said:

Holy hell those are expensive... I was thinking about adding UV next, but ill have to save up for a bit if I do those.

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You only need supposably one strip per 4X4. Only gonna be a $200 investment on strips and another maybe $80 on 2 XLG-200-L

Airwalker16 said:

You only need supposably one strip per 4X4. Only gonna be a $200 investment on strips and another maybe $80 on 2 XLG-200-L

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yeah im working in a like 8x6 floor space.

Re: thermal tape.

I had to remove some led carriers recently that were set in using this stuff. They didn't want to let go. I had to slip a razor knife between the carrier and the heat sink to get enough of a gap to get a screwdriver in. It actually bent the carriers.

I wouldn't worry it will let go as long as you prep both surfaces well.

Powertech said:

So at over 500mW in almost a 5x5, I shouldn't need them turned on very long

Strips will be here soon, but I don't even have anything in flower at the moment. I have a few girls that will be going into flower in the few weeks, so it could be awhile before i can show anybody results.

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Ya that's ~215mW/m2. You may only need 3× 20min sessions. I'd start low and work up. I'm guessing less would be easier to work with. The more even the spread the better. Multiple single chips evenly spaced would be better than 1 center grouping of the same number of chips.

SupraSPL said:

Its been a few years! I got into a bunch of other projects and neglected growing for the most part. I lost most of my cuts from neglect over time but still have a handful of good ones to work with.

My recycled soil got worn out/out of balance so I stopped amending with ferts and left the buckets in the rain for about a year, then cut them with 30% compost and now getting some better results.

But the Cree COBs, passive cooled armada, Meanwell drivers, Sensda fans and recycled carbon filters are still doing their thing so I figured I check in on you growers and see whats the new tech?

These ladies are about 5 weeks in, under CXB3590 3500K passive cooled, 700mA, recycled organic soil, rain water with dolomite. In the back is Cali Connection Grape Kush feminized and in the front is G13 Labs Sour Jack feminized. Only running half of one room so temps down there are WAY too cold, 52-54f at night and 56-60F during lights on. Once I click on a few more rooms it will warm up decently though.

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Check out new meanwell XLG drivers dude.

Yeah, I don't even have space available for new lighting, but I can't stop designing new fixtures using XLG units, for no particular reason whatsoever.
Could be as simple as, there is an X on it.
Obsessed with the XLG-200-H-AB.

Ive been looking at them. The 150/200/240-H look like the only interesting ones imo, but you can only use them for parallel builds in most cases.
The HLG 2 board 288 kits now say they use a Meanwell XLG-240-M-AB which sounds like a terrible choice with its 1400ma output.

fragileassassin said:

yeah im working in a like 8x6 floor space.

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Okay. So 3 of em.

fragileassassin said:

The HLG 2 board 288 kits now say they use a Meanwell XLG-240-M-AB which sounds like a terrible choice with its 1400ma output

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If you look closer at the data sheet, there is a full power current range, that goes up to 2100 on that model. So as long as you're not using up more voltage than will allow for 2100ma, that will be it's maximum.
So with 108V from two boards, they should get the 2100 each. Maybe even a touch more.
At least that's my understanding, of how these constant power drivers work. For the L, M, and H - models, they're not quite CC, or CV. The current is adjustable, within certain ranges, all working back to a 240W capability.(or whatever it's rated to).

This may not be fact, I'm just figuring it out based on what I see on paper!

Edit: It took me multiple looks to get a grasp on it.

fragileassassin said:

Ive been looking at them. The 150/200/240-H look like the only interesting ones imo, but you can only use them for parallel builds in most cases.
The HLG 2 board 288 kits now say they use a Meanwell XLG-240-M-AB which sounds like a terrible choice with its 1400ma output.

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Depends what your doing with them, the M has 90-171v and 700-2100mA so its fine for series.

ok that makes more sense, was just looking at the product pages and they all say 1400.
So that means the H version isnt 4900 only.
interesting, ill have to look at those a little closer later.

fragileassassin said:

Ive been looking at them. The 150/200/240-H look like the only interesting ones imo, but you can only use them for parallel builds in most cases.
The HLG 2 board 288 kits now say they use a Meanwell XLG-240-M-AB which sounds like a terrible choice with its 1400ma output.

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Chip Green said:

Yeah, I don't even have space available for new lighting, but I can't stop designing new fixtures using XLG units, for no particular reason whatsoever.
Could be as simple as, there is an X on it.
Obsessed with the XLG-200-H-AB.

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I use all XLG's. I have 2ea XLG-50-AB, 1 XLG-75-H-A, 4 XLG-100-H-A, 1 XLG-100-L-AB, 1 XLG-150-L-AB, 1 XLG-150-M-AB, and 1 XLG-240-H-AB

That's my flower tent, i'll work on veg tent next. It only has an AGLEX2000 in it, with likely the cheapest driver possible lol!

Powertech, I am understanding how these XLG constant power versions, operate correctly....correct?

If I'm talking out of my bunghole, somebody stop me.

Well that's another light installed !! ...crazy bright !!! - STELTHY

ChiefRunningPhist said:

Its a tight grouping of 280nm chips imo. Erythemal weighting factor is greater than 1 at 280nm if you extrapolate. UVI is the quotient of the erythemaly weighted UV divided by 25mW/m2. A UV index of 10 is 250mW/m2 of erythemaly weighted UV. If your peak WV is 280nm your erythemal weighting factor is theoretically over 1, but this is already evident as you mention the shorter the WV the more damage to human tissue (aside from the absorption spectra of DNA), so this already correlates to a degree. There have been studies that show increased PPFD correlates with increased total UV tolerance, so if trying to get an idea of doseage based on typical UVI of the light it evolved under, it seems you're looking at half the intensity at least, due to indoor PPFD being possibly half the intensity of the sun, this of course assuming the relationship scales linearly.

Here's the UVR8 action and erythemal overlay...
View attachment 4487581

Imo 295nm is the golden ticket as it seems to trigger HY5 and UVR8 more efficiently than any other single WV chip. Followed by 280/285, and finally 310nm. At least in vivo.
View attachment 4487583

One of the growers here, @nachooo was maxing his tolerance at 60mW/m2 (4 chips equally spaced about 1m2) of 280nm at a duration of ~3.0hrs - 3.5hrs a day if I'm not mistaken.

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Yes..you are right...Thats what I used.. You remember well! Have to say that I used the plants to UVB since veg...upping the potency slowly. I posted about it in other forum.. but for you to see the results here are some pics...genetics are personal from old landraces , not commercial, Can affirm that there was a great increase in colors, trichomes and also less problems with pest than usual..Colors appear at 7 weeks of flowering...not cold, not flushing...same clones without UVB gave much less colored buds

nachooo said:

Yes..you are right...Thats what I used.. You remember well! Have to say that I used the plants to UVB since veg...upping the potency slowly. I posted about it in other forum.. but for you to see the results here are some pics...genetics are personal from old landraces , not commercial, Can affirm that there was a great increase in colors, trichomes and also less problems with pest than usual..Colors appear at 7 weeks of flowering...not cold, not flushing...same clones without UVB gave much less colored buds

View attachment 4489381View attachment 4489383View attachment 4489384View attachment 4489385View attachment 4489386

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Pics of the Hardware PUH-Leeeez!! Wanna see them diodes, drivers, and the mounting. Also, howre you using them? Cost? Wattage? How long per day? SPILL IT, @nachooo!!!!! ^_^

Airwalker16 said:

Pics of the Hardware PUH-Leeeez!! Wanna see them diodes, drivers, and the mounting. Also, howre you using them? Cost? Wattage? How long per day? SPILL IT, @nachooo!!!!! ^_^

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I did two aluminium bars with 2 seoul viosys 285 nm leds per bar. Each bar has also 9 UVA leds 365,385,410nm..well the 410 is near UVA..So..two different channels one for the UVAs..and one for the UVB.. There was also another group of 3 UVA leds per bar that were connected in series with the UVB leds..Those UVA leds acted as a signal, just to notice that the UVB were running..UVB leds give almost no visible light..so to notice they are working you have to look directly at them...(never do that) so I put other UVA leds in series in the UVB channel to be sure the UVB ones were on.
The area was one square meter. The UVB leds were Seoul viosys CUD8GF1B model, but in star board purchased in digikey some months ago...a few time later they were out of stock sadly...
Those leds are supossed to be drived at 100ma, but I overdrive it a little 150ma..to obtain according with specs 15mw output power per led
https://www.neumueller.com/datenblatt/seoulviosys/CUD8GF1B_R1.0 (285nm_CA3535).pdf
The UVA channel (2 bars) was used all day since veg...10 watts at start and 30 watts at peak flowering..increasing the wattage slowly day by day
The UVB channel (2 bars) was used also sinve veg...starting half an hour per day until a maximun of 3,5 hours...at peak flowering..more hours gave me UVB burning issues...
Some pics of UVB leds and the bars...sorry about quality and poor man design





In this last pic you can see one of my fixtures..with samsungs 3500k strips, some 660 osram square, some 730 osram oslon, and the bar with the UVA channel on (365,385,410), and in the right ...one of the UVB leds that is off at that momment...the 3 star boards left to the UVB led, are the signal UVA leds also off..sorry I do not have a pic of the whole bar...but I hope you can figure it...

The UVB channel was drived with a cheap ebay CC driver 300ma. The 2 bars in parallel so 150 ma each one..
The UVA channel was drived by other CC driver with dimming capabilities.
Cost of UVB leds 20$ each one.

SupraSPL said:

DNA absorbs 254 nm UVC which makes UVC awesome for germicidal lamps, killing germs in water and air filtration systems. I looked at the product ZGE285-12UVC_B and it is 280nm and 310nm, so essentially it is UVB just like fluorescent tanning lamps, reptile lamps and the bright noon sun. You should still shield your eyes from UVB but it is not nearly as dangerous as 254nm UVC.

Chronic irradiation with 222-nm UVC light induces neither DNA damage nor epidermal lesions in mouse skin, even at high doses

Surgical site infections (SSIs) represent an important clinical problem associated with increased levels of surgical morbidity and mortality. UVC irradiation during surgery has been considered to represent a possible strategy to prevent the development of SSI. 254-nm UVC induces marked levels of...

journals.plos.org

Also UVB if filtered out by lenses or covers, so it would have to be run bare or with special UV glass, giving an edge to diy designs

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Damn man, you turned me on to 1st version optic lights many moons ago. Still cant thank you enough for the rewarding and dank journey i set off on through your inspiration.

Great to see you back here

@SupraSPL you reccomended Optic??