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The Basics Of Plant Lighting

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VonDankenhoek

On Vacation
I haven't tidied it up yet but it is in service! I had a few little setbacks during the final assembly. LED builder realstyles helped me with troubleshooting and it lit up.

Each panel of 2 cxb3590, 3500k, @.7mA is pulling 119w. Cree data says 56% efficient and the meanwell hlg 120h 700c (A version) is about 92% efficient with that load.



The cob spacing isnt really precise for light distribution but i think it makes sense. The 4 center cobs are at about 80w each 40% efficient. I spaced the crees further awaqy from the veros because of slightly lesser par. My goal with adding the wings was to get full illumunation out to the edges. I got a simple meter coming soon and I'll see how the intensity pattern shapes up.



Ive got one plant at about 3.5 weeks 11/13, one plant at about 12 days 11/13 and those lil gals are just in a day or two.
 

Graytail

Plant of the Year: 2014 - Plant of the Month: Dec 2014 - Nug of the Month: Feb 2015, Mar & Aug 2016, Dec 2017, Aug 2018, Jan 2019 - Nug of the Year: 2017 - Photo of the Month: June 2018
So you're running 320+238=560 watts in that space? Heheh, I think you have enough umols now. :slide:
 

VonDankenhoek

On Vacation
Looks to me like the plants responded very positively to to 3590s right away.

Heres a couple that give a sense of the scale of things. The overall length wall to wall at 3' high is about 50 inches. The width gets to be about 26 inches as plants fill out. Adding the wings obviously brightened up the whole space. Will the plants branch out and grab that energy? You know it.

The left plant is Sugar Punch 15 gal i have extremely high hopes, its a very fine strain. The other large plant is Destroyer. Both of those looking very sativa. The smaller plants are cuttings that i'm flowering in small pots.



New PC and new photo processing so excuse the learning curve please.
 

Icemud

Member of the Month: July 2012, July 2014 - Nug of the Month: July 2012
Hey Vondankenhoek... really like watching your DIY LED project... do you have a journal you are keeping for this ? I didn't see a link in your sig and would love to sub.
 

VonDankenhoek

On Vacation
Ice, thanks for your encouragement. Just as i suggested to GT, think about doing a DIY. It's not very expensive, great learning along the way and a super supportive network of DIYers. MOST IMPORTANTLY if you select the best stuff and have a good budget you can blow just about anything commercially made out of the water.
 

Icemud

Member of the Month: July 2012, July 2014 - Nug of the Month: July 2012
Ice, thanks for your encouragement. Just as i suggested to GT, think about doing a DIY. It's not very expensive, great learning along the way and a super supportive network of DIYers. MOST IMPORTANTLY if you select the best stuff and have a good budget you can blow just about anything commercially made out of the water.
Thanks for the reply VonDankenhoek...

I definitely will be doing a DIY project in the near future but still researching exactly what I would build. When I do it, I will have "prototype" in mind, as I want to build a LED that addresses the issues that current LED's on the market have that I have been taking notes on.

Also I have been doing a ton of research on plant morphology due to light reaction as well as spectrum efficiencies and photosynthesis so I will be doing a little bit more than just doing all white LES chips (vero, CXB/CXA). I think the LED (light emitting surface) chips are good, and damn near perfect, but still lack in the deep red, Indigo/blue/green and also deep blue/UV area so I will be addressing those areas as well as adding Green mono diodes to the panel. I can't unfortunately share the ideas I have too much because I do plan on eventually making lights to sell, professionally, but still a couple years out from that being a reality yet. My goal is to match the suns spectrum with a slight bit more deep red but with other improvements too that I can't talk about. (too many greedy LED companies would take my ideas and run with them)

I just see so many things that can be improved on the current state of the lights so I hopefully will be able to get the DIY going soon, at least for a couple prototypes to run and test before deciding to take it to manufacturing.

I definitely have mad respect for the DIY crowd and I will be one of you very soon :) I will say that they will include LES chips though (haven't decided between vero for the price or cree for the extra effiency and Lumen maintenance.
 

HydroDyna

New Member
Vero likes a high current, at high currents they're close as efficient as the Cree chips.
Vero being a bit cheaper, Cree a little more efficient.

If you run them soft, Cree is the way to go as the efficiency of the CXB scales a lot better for lower currents than Vero.
 
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