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What LED to buy in 2019 ? by Doris Simmletit - Sat, 17 Nov 2018 23:56:11 EST ID:D6OT6Wh/ No.146441 Ignore Report Quick Reply
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Priscilla Pallerford - Mon, 19 Nov 2018 00:38:35 EST ID:B0kZyQRI No.146442 Ignore Report Quick Reply
how big is ur grow space? how much weed do you want to grow
Emma Drallerham - Mon, 19 Nov 2018 06:19:42 EST ID:D6OT6Wh/ No.146444 Ignore Report Quick Reply
I want to grow big tomatoes
Lillian Barryhure - Tue, 20 Nov 2018 04:19:47 EST ID:xgFbodcG No.146448 Ignore Report Quick Reply
Bump for curiousity,i wanna start indo growing too
Hugh Drobbernock - Tue, 20 Nov 2018 07:03:26 EST ID:ePUTzbMD No.146450 Ignore Report Quick Reply
300 - 400 actual watts with white LEDs for 3x3, but you'd probably yield too many tomatoes.

https://timbergrowlights.com/ and https://horticulturelightinggroup.com/ are two pretty common sellers.
William Senningdire - Tue, 20 Nov 2018 10:07:37 EST ID:D6OT6Wh/ No.146452 Ignore Report Quick Reply
thats overkill
250W hps will make a jungle in that space.
Albert Blinderridge - Tue, 20 Nov 2018 10:34:19 EST ID:ef1tcmWF No.146453 Ignore Report Quick Reply
Cheap red and blue sets from China work just fine. Even if some lights are more efficient and save you money that way, there's no way it's going to be enough to recoup the difference between a $50 set and a $500 set.

These Mars Hydro sets have been around for a while and have a good reputation:

I went for something even cheaper and less brand name and it still produced very healthy plants.
Phineas Pickshit - Tue, 04 Dec 2018 12:55:57 EST ID:ePUTzbMD No.146469 Ignore Report Quick Reply
Yeah because obviously plant greenness is the only thing that matters, oh and yield. Quality doesn't matter.
Phineas Seblingson - Tue, 04 Dec 2018 16:47:20 EST ID:Az88fn/6 No.146470 Ignore Report Quick Reply
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George Gappermuck - Mon, 17 Dec 2018 09:28:30 EST ID:yYZJN6pi No.146488 Ignore Report Quick Reply
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It really depends on what level of quality you're looking for, how much you're willing to pay for that extra measure of quality, is your grow skill high enough that it's even worth paying up to ~10x for a more "expert level" level of setup for it to make the potential difference in outcome? Because any difference in quality will still mostly be in your hands regardless.

You can pull off a decent grow with a cheap Mars Hydro or ViparSpectra from Amazon.
A old grower once told me "potency is about 70% genetics, and 30% you getting your grow (gear, nutes, lights, etc) on point.

If you're brand new at this, i'd say learn the ropes without spending a fortune on equipment.

That said, Blurple LED can touch the good White LED's like the Samsung QB288 or QB304 as fas as light that the plants can actually use to their benefit.

Im picking up an HLG 360Elite soon. I think a good light is no doubt worth it, if you're a seasoned grower who is serious about growing some fire crop. If not, dont get ahead of yourself to the point where the overkill isnt even being used to any notable benefit.
George Gappermuck - Mon, 17 Dec 2018 09:32:19 EST ID:yYZJN6pi No.146489 Ignore Report Quick Reply
**the Blurples cant touch the best and most modern White LED's in terms of quality of light output and efficiency of usable light, and the only people really using blurple are doing so out of financial necessity or because it just looks cool or wtf ever
Graham Greenbanks - Wed, 19 Dec 2018 11:24:56 EST ID:QYyR9uzQ No.146493 Ignore Report Quick Reply
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LED high bays.
Considerably cheaper than most grow lights, use pretty much the same components and are pretty easy to find.
You need to be careful with all the cheap shit flooding the market, which is often made worse by the fact that most manufactures use the exact same heatsinks. But if you get one that meets industrial standards, it should outlast many of the similarly priced LED grow lights since they're usually suspended 20ft in a hard to reach place,
Frederick Henderforth - Sat, 29 Dec 2018 02:20:53 EST ID:gD0WA94Y No.146514 Ignore Report Quick Reply
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I'm looking to move from HPS to LED. The summers are just too much, and the power consumption is also a bit concerning.

Currently using 600w in a 90x90x180cm grow tent.

The ease of purchase with the hps is something else... $60 for a light and its going to be 'just as good' as the next one is great. But LED's seem to have a lot of snake oil salesmen and amazon referral tactics going on.

From my understanding, the 600w in my grow space is overkill and I could've gone smaller. And this corresponds to what a lot of the led manufacturers state in their coverage + hps comparison.

I'm looking at BESTVA (probably the 1200w), the VIPARSPECTRA 300w and the Advanced platinum series P300w. Anyone have experience with these brands?
Frederick Henderforth - Sat, 29 Dec 2018 02:25:24 EST ID:gD0WA94Y No.146515 Ignore Report Quick Reply
I'll also add that these look to be great, though I'm not sure of any products using/planning to use them.

Esther Pevingsune - Wed, 02 Jan 2019 10:38:54 EST ID:ePUTzbMD No.146517 Ignore Report Quick Reply
Stick with the HPS if you're not running into temperature problems. The blurple panels you listed are total crap.
Graham Chirryshit - Wed, 02 Jan 2019 15:21:58 EST ID:S69Ie05p No.146518 Ignore Report Quick Reply
Agree with everybody suggesting white LEDs, they have been improving so much that using anything else has become pretty much pointless.
Never buy _any_ of the purple shit panels, they are always 100% chinesium crap.

Get these Samsung Strip COBs:

They have between 178-198 lm/w, more if you under-drive them.

Cooling can be done using aluminum profiles from the hardware store.
Minus the time it will cost you about as much as a half decent HPS watt for watt, with (actually) twice the efficiency.
Graham Chirryshit - Wed, 02 Jan 2019 15:28:20 EST ID:S69Ie05p No.146519 Ignore Report Quick Reply
Link got botched, that one works:
Walter Tootman - Thu, 03 Jan 2019 01:34:55 EST ID:dQpBvw64 No.146520 Ignore Report Quick Reply
These are mostly what I use https://horticulturelightinggroup.com/collections/lamps/products/hlg-550 supplemented with Cree XLamp CXB3590s for most things I grow indoors.
Hannah Deddlewell - Thu, 03 Jan 2019 18:29:58 EST ID:gD0WA94Y No.146521 Ignore Report Quick Reply
Thanks for the reply mate! I'll look in to those.

Yea I am having temp issues. It's 43c here in oz today. :(
Beatrice Pimmlebury - Fri, 04 Jan 2019 16:21:41 EST ID:ef1tcmWF No.146523 Ignore Report Quick Reply
I'm still not convinced that white light has any benefit for weed. All the research I can find shows that orange light is pretty much useless and green light increases stretch, speeds flowering and decreases THC production. The peaks of the spectrums I've seen for all white LEDs with a CRI below 90 have their red/orange peak closer to orange with very little in the 630-660 range. IDK why higher CRIs shift the peak over to a more useful range, but they do. The super high efficiency LEDS are all lower CRI though with lots of useless light that's great for boosting lumen ratings but not great for growing plants. Efficiency is only good for reducing electrical costs and heat, but unless you're growing tons of plants the energy savings will be negligible and even inefficient LEDS already put out little heat.
Priscilla Wobberstone - Sat, 05 Jan 2019 03:05:27 EST ID:D3o5rZzk No.146528 Ignore Report Quick Reply
I think the 14TH lights from DormGrow look really promising for the money. They have a kit that has a blue spectrum veg panel and all red bloom booster UFOs or they have dedicated full spectrum bloom panels. All look like decent quality for the money. I'd use them if I were doing a smaller grow.
Priscilla Wobberstone - Sat, 05 Jan 2019 03:07:33 EST ID:D3o5rZzk No.146529 Ignore Report Quick Reply
They are called G4 lights. No idea why my phone changed that to 14th...
Lillian Brookforth - Sat, 05 Jan 2019 13:00:37 EST ID:S69Ie05p No.146534 Ignore Report Quick Reply
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They use all wavelength of light roughly between 400-700nm, to different extent. Chlorophyll does not but higher plants (meaning more complex all but a few single cell algae) have a bunch of different pigments used in photosynthesis.
This has been well documented and well known for almost half a century. It's just that the PR BS spewed by purple grow light peddlers claims otherwise.

The spectrum does matter yes and red light in the 640-660nm region is generally the most efficient form, but not overly so.

The spectrum of a 3000K white LED is actually pretty close to the optimum already.
Could you improve the overall efficiency by adding red leds, yes but the point is that this is no longer practical.
Utilizing these red LEDs requires a custom build PCB and requires costly low volume assembly and those LEDs have to be purchased too, in relatively low amounts. All this is subject to the economy of scale, so it is much more cost efficient to utilize components made for general purpose illumination. You simply counteract the lack of "tailored" (again the 3000K LED spectra is already close to optimal) wavelengths by purchasing higher quality components.
Lillian Brookforth - Sat, 05 Jan 2019 13:19:21 EST ID:S69Ie05p No.146535 Ignore Report Quick Reply
>All the research I can find shows that orange light is pretty much useless and green light increases stretch, speeds flowering and decreases THC production.

Disagree? Then post said "research", just keep in mind that if it is done by an entity selling burple lights you will be laughed at.
Samuel Shittingbury - Sun, 06 Jan 2019 14:35:27 EST ID:D3o5rZzk No.146536 Ignore Report Quick Reply


These are some of the best bluprples for the money on the market. The 600W bloom panel is a true HPS replacement in regards to yeild and quality in a 4x4 space.
Eliza Bockletack - Mon, 07 Jan 2019 19:36:25 EST ID:ef1tcmWF No.146537 Ignore Report Quick Reply
It's not so much a question of whether or not the plant can use the spectrum of light, but whether exposure to that spectrum of light causes changes in plant physiology that are desirable for growing the dankest weed. THC production seems mostly dependent on red and blue and the only real measurable effect I can see from anything outside of that is to increase stretch and speed flowering and also reduce THC at the expense of strectching if there's too much of it. White LEDs shouldn't have enough green or far red to cause shade avoidance syndrome and reduce potency but honestly I don't know for sure. I know that too much will decrease potency, so how do I know that just a little won't also reduce potency even if by just a little? More stretch might be beneficial to you, it might not be, it's really more of a preference. I prefer to grow sativas so I like the spectrum red/blue fixtures produces. I don't buy this marketing hype that these are somehow totally superior. They sell better because they produce better numbers and they don't produce that obnoxious purple glare but they basically grow the same weed as red/blues with just a little more stretch if you run them at similar wattages but they're more expensive. You're going to pay the same price as a complete blue/red fixture just to buy the driver to power a similar white DIY build.
Molly Claffinghudge - Fri, 11 Jan 2019 06:50:04 EST ID:ePUTzbMD No.146541 Ignore Report Quick Reply
what's the point of growing sativas with blurples? You don't have any UVB, which is required for THC-V for example.

I've grown with all types of lights, different blurples always produced the shittiest weed. CMH produced the best, then Quantum Boards.
John Lightbury - Wed, 16 Jan 2019 13:05:55 EST ID:biz785N3 No.146550 Ignore Report Quick Reply
>THC production seems mostly dependent on red and blue
I'm not sure that's even close to true. If you're looking to increase potency, the only real way is to either increase the Par rating (still debatable) or by providing supplemental UVB. Cannabis produces THC as part of its defence against UV light, which means Supplemental UV is pretty much the only confirmed method of increasing potency. You're not going to increase potency by giving your plants extra red or blue, it simply doesn't work that way.
When it comes to grow lights, the most important factor (other than colour spectrum) is Par. At the moment, the lights with the highest par ratings are all white LEDs. Even HPS and HID lights are known to have better efficiencies than Blurple lights, simply because they have higher PPFD/watt ratings.

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