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Good honest answer! I love that in growers here
. Looks like I'm kinda back in the middle of the spectrum.
InTheShed Grows Inside & Out: Jump In Any Time
. Looks like I'm kinda back in the middle of the spectrum.
Ok Shed! I’m gonna need you to build a light and then just tell me what you did. Good meeting!
nobodyhere
Well-Known Member
You can do it all under 3500k and be very happy. If I were buying one light, it would be this temp.
My comment re 4K earlier was the 100w vero vs the kind. I veg at 4K + the kind (3K-when there are more plants than lights, but plan to buy another 4K chibi to replace the kind). 100w running at various powers vegged that 50" Rasp D that's in flower now.
Over in the flower tent I have:
200w 3.5K (original fixture)
added 50w of 660nm that I don't think does much.
200w 3K (new fixture)
Anyway, when I veg a big ass plant under that Kind led that is all purply crazy red, I get a ton of fast growth and lower die off. Under the 4K 100w vero there is more penetration (single point and spread) to veg more plants, I don't get saggy lower leaves on large plants either.
Can I flower under 4K and veg under 3K. Yup. But there is some loss of efficiencies.
Also, if your going to be using the light outdoors, make sure you have all the necessary and proper wiring crap/connectors. Another plug for Dan is that his crap comes like that.
Interesting discussion.
My earlier comment was based on the 4 spectra presented in the post. Of those, I liked the 4000K. What does the 3500 spectrum look like?
PurpleGunRack
Well-Known Member
Thanks gang! These are the ones Rider included in the list:
SI-B8UZ91B20WW Samsung F-Series Gen3 100W FB24B double row led strip 3500K
Is that too old school? I haven't researched yet to know if they're LM561C or not. They already have like 3 model numbers in that description! I'm completely new to this part of the game.
[here's the list from Rider in total if anyone has suggestions:
Digikey.com
SI-B8UZ91B20WW Samsung F-Series Gen3 100W FB24B double row led strip 3500K
3 x $48.07 = $144.21
Onlinecomponents.com
Mean Well HLG-320H-48A 320W LED driver
1 x $84.10 = $84.10
Figure about $50 in miscellaneous stuff to assemble. You'll end up with way more light and better coverage.
This design is working with the de facto standard of 35W per square foot for leds.
These components play really well together and return about 95% efficiency.
You'd need 12' of 1.5x1x0.125 Al u-channel, some thermal tape (which I can send you),
a standard 15A male cord plug, and some wire and wire nuts to put it all together.
No soldering required. There are lots of ways to make a single fixture. I chose to use all-thread just because it was easy.]
Stay away from the double row strips, the single row strips requires more heatsink but you get a lot higher efficiency, and you can't run the double row strips as hard and the spread/flexibility is compromised.
The 1120mm (4') single row F-series strips are all right, but a bitch to work with and you won't really save anything over going with the 560mm strips.
However, I highly recommend the H inFlux strips, L04 or L06 in 3000K, but note that 4000K is as efficient as 5000K in the same series with a lot more red in the mix.
Digi-key is full of weird dead-ends, but you can find the actual units with a little effort and their parametric search function.
This is the H inFlux catalogue, so you can filter the different units, use only CCT and size/dimension to find what you need.
The 41mm W are double row, the 24mm W are single row and come in two types with different amounts of diodes - hence the different max currents and prices.
And ye olde F-series.
I think 6 of the 560mm strips would be fine for your needs, whether it's single row F-series or H inFlux L04 or L06.
There's also the Bridgelux EB2 strips, or the Vesta strips that have 2 row of different CCT diodes.
This is worth a read DIY LED Strip Build Designs for Samsung H-Series, F-Series, Q-Series, and Bridgelux EB Gen.2 - LED Gardener
No, get 3000K!
The higher the CCT, the higher the electrical efficiency.
The lower the CCT, the higher the photosynthetical efficiency.
AKA the redder the better
Since the difference in electrical efficiency between the different CCT's is low when using high end Middle Power Diodes.3500K is a WORSE start to finish than 3000K, you sacrifice red for blue, or in reality a few hours shorter veg for less bulk and potency
Don't believe the shit Kind spews out to increase sales, it's just BS based on loose assumptions and non-comparative studies from the 70's...
Kind is just Mars Hydro in an Iphone cover, and the electrical efficiency is the same as HID, complete and utter garbage
Try asking them why they put yellow and green monodiodes in their lamps if they're not good for plants
The mixed spectrum from most blurples is around 2700K, it's not some magical spectrum engineers spent countless hours tweaking just right, it's a handful of crappy components and a lot of marketing...
Watt for watt the PPFD willl be higher from high end white light LEDs, even the super cheap Citizen 1212 COBs will kill Kind and the other blurples.
The yellow/orange/green spectrum is a big part of the sun's output and plants do use these wavelenghts for both photosynthesis and for signalling the plant to do certain things, we've only scratched the surface of the science of plants and light and most of the stuff found online is commercial content.
Green wavelenghts will signal lower growth to strecth for light, and it's the wavelength that penetrates the canopy and the primary provider of photosynthesis for leaves/flowers in the shade.
nobodyhere
Well-Known Member
You read my mind.
- Thread starter
- #7,087
Will doOk Shed! I’m gonna need you to build a light and then just tell me what you did. Good meeting!
.Who said anything about using these outside?
Amazing compendium of info there PGR! Thanks so much for putting all that in one post3500K is a WORSE start to finish than 3000K, you sacrifice red for blue, or in reality a few hours shorter veg for less bulk and potency
. I'll go through the links tomorrow at work and take notes on what I find. In terms of the best color temperature, I'm not sure if you saw my post on the outdoor/indoor aspect of this grow a few posts ago, which is to say these lights are a nighttime addition to daytime sunlight and will be used mostly to veg photos and autos, except for flowering autos at night in supplement to the daytime sun. Does that change your color temp recommendation at all?
Oh, and thanks for reading nobody's mind!
nobodyhere
Well-Known Member
Will do
Who said anything about using these outside?
Amazing compendium of info there PGR! Thanks so much for putting all that in one post
In terms of the best color temperature, I'm not sure if you saw my post on the outdoor/indoor aspect of this grow a few posts ago, which is to say these lights are a nighttime addition to daytime sunlight and will be used mostly to veg photos and autos, except for flowering autos at night in supplement to the daytime sun. Does that change your color temp recommendation at all?
Oh, and thanks for reading nobody's mind!
No, i say aim for 3-3.5k with a dimmer.
CraZysWeeD
Well-Known Member
Great you showed up @PurpleGunRack you think the inFlux is better? I have been thinking of getting a few to boost my Logics in the small tent.
PurpleGunRack
Well-Known Member
Nope, 3000K all the way
Yes, it's the best strip you can get and with LM301b diodes they're more efficient than the F-series that strips use LM561c diodes.
Interesting information. Maybe I will tap into some of this expertise for some strips in the new set up. I am gonna need a new setup for the veg tent I think.
CraZysWeeD
Well-Known Member
Great. Will order a few of those then. Thinking about water cooling them too. Just take U shaped aluminum like you and strapping a pipe along the U.
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- #7,093
Thanks again PGR! Research begins today...Nope, 3000K all the way
Yes, it's the best strip you can get and with LM301b diodes they're more efficient than the F-series that strips use LM561c diodes.
Glad I can help Van!
AaaaaaaaaaaaaaahhhhhhGreat. Will order a few of those then. Thinking about water cooling them too. Just take U shaped aluminum like you and strapping a pipe along the U.
CraZysWeeD
Well-Known Member
Thanks again PGR! Research begins today...
Glad I can help Van!
Aaaaaaaaaaaaaaahhhhhh
You know what. I will put together a kit for you just for fun.
Ok problem!! I can’t get the light more than 20” above canopy.......
Is this going to be a problem!?!?
Is this going to be a problem!?!?
Looks fine for now.
I always found these charts useful. 
Also keep in mind that 12 hours of tropical sun every day would probably not be a good thing.
Also keep in mind that 12 hours of tropical sun every day would probably not be a good thing.
oops wrong thread.... sorry ! Thanks penny.
shes far enough in flower to not stretch anymore if ye ask me so it should be fineOk problem!! I can’t get the light more than 20” above canopy.......
Is this going to be a problem!?!?
CraZysWeeD
Well-Known Member
The best thing you can do there is moving the filter outside of the tent. Get a bigger duct that the filter will fit in to and get pre made adapter holes for a hose down to the tent. It have saved me a lot of space inside the tent.
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