Northern Grow Lights Photon 180 Citizen 1825 90 CRI

Aruanda

Well-Known Member
[Update: Day 22 of flower (since flip)]:

Spent like 2h reconfiguring and gerryrigging my set-up to include the second Photon 180 - 3500K 80CRI. The left side is the 90, the right side is the 80. The tallest tops on my flowers are only 25cm(10in) from the light so I may raise it a bit more tomorrow after switching out the cables for daisy chains. However, the lower tops have a nuanced stratification between 46-56cm (18-22in) from the light.

Some considerations with the addition of the second light is that as I am already seeing some calcium deficiency spots (or what appear to be anyway, dead necrotic spots on some leaves), the plants will certainly need a boost of Cal to complete their cycle. Nutrient demand in general may increase. I think my CalPhos solution made from bone meal and apple cider vinegar should be done soon and my homemade bloom fertilizer is brewing (my local hydro shop is waiting on an order of CalMag and it's not easily available to me but would prefer not to even buy stuff like that).
I'm still working with some of the bottled BioBizz products. My last soil drench feeding included these products along with molasses, silica powder, horsetail tea and 2tsp of Epsom salt. The following days showed some progression of burnt tips on leaves which leads me to believe that the Epsom salt is to blame and should be discontinued. The molasses should probably account for any and all magnesium the girls are requiring.

Current RH is 38%
Current temp is 82°F

The temps are another consideration. Will have to readjust what I keep my AC at. Would about 80-82° be ideal during the lights on? Everything I've read says max should be about 79°.


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Aruanda

Well-Known Member
Why do you need/want it that high?

I made the addition based on what I was observing with certain flowering areas that were shaded. But that really has to do with the type of training I did. I made the addition to just see how it would increase visible light exposure to the more shaded tops. Those areas are getting more light but maybe I should just remove huh?
 

Evil-Mobo

Well-Known Member
I wouldn't remove it you have it. They have dimmers too. Just keep an eye on how the plants feed with all that COB power over them. There is nothing set in stone with these lights and how to grow with them, I just feel 90w/sq ft is way overkill regardless of light for growing in such a small space.
 

Aruanda

Well-Known Member
:-?:-?:-?

Hmm... I think maybe I really did get ahead of myself here and should pull the second one...
 
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Aruanda

Well-Known Member
Okay okay, back down to just the 1. Guess I will just have to wait on utilizing both when I move and can upgrade to the 2x4 tent. Well thanks @Evil-Mobo and @hillbill for helping me think that one through better.

P.S. Happy Halloween everybody!
 

Herb Smith

Well-Known Member
Okay okay, back down to just the 1. Guess I will just have to wait on utilizing both when I move and can upgrade to the 2x4 tent. Well thanks @Evil-Mobo and @hillbill for helping me think that one through better.

P.S. Happy Halloween everybody!
I have a Northern Lights Photon 180 Gen 7 with the new Vero 29's. I have not had a chance to use it yet but your grow gives me promise. I know this grow can't really be a comparison for my light but is does give an idea of the quality of their lights. Thanks for taking the time to journal this.
 
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Aruanda

Well-Known Member
I have a Northern Lights Photon 180 Gen 7 with the new Vero 29's. I have not had a chance to use it yet but your grow gives me promise. I know this grow can't really be a comparison for my light but is does give an idea of the quality of their lights. Thanks for taking the time to journal this.

Should be really good with the Vero's too for sure! Will keep an eye out for your posts if you decide to document it here. I'm not sure I've seen any Photon 180 Vero 29 journals on here?

Well I'm glad my first grow/journal with these lights is beneficial to someone, even with my momentary lapse of judgement on overdoing it with adding the second light. All for the best, probably better to see just the one to get an idea huh. @NapalmD journal with the same light is a great journal to check out too.
 

Herb Smith

Well-Known Member
Should be really good with the Vero's too for sure! Will keep an eye out for your posts if you decide to document it here. I'm not sure I've seen any Photon 180 Vero 29 journals on here?

Well I'm glad my first grow/journal with these lights is beneficial to someone, even with my momentary lapse of judgement on overdoing it with adding the second light. All for the best, probably better to see just the one to get an idea huh. @NapalmD journal with the same light is a great journal to check out too.
I will be using a 2x4 as well and I was wondering how 2 lamps would work in there. Thanks for the test you did. :grin:
 

sixstring2112

Well-Known Member
[Update: Day 22 of flower (since flip)]:

Spent like 2h reconfiguring and gerryrigging my set-up to include the second Photon 180 - 3500K 80CRI. The left side is the 90, the right side is the 80. The tallest tops on my flowers are only 25cm(10in) from the light so I may raise it a bit more tomorrow after switching out the cables for daisy chains. However, the lower tops have a nuanced stratification between 46-56cm (18-22in) from the light.

Some considerations with the addition of the second light is that as I am already seeing some calcium deficiency spots (or what appear to be anyway, dead necrotic spots on some leaves), the plants will certainly need a boost of Cal to complete their cycle. Nutrient demand in general may increase. I think my CalPhos solution made from bone meal and apple cider vinegar should be done soon and my homemade bloom fertilizer is brewing (my local hydro shop is waiting on an order of CalMag and it's not easily available to me but would prefer not to even buy stuff like that).
I'm still working with some of the bottled BioBizz products. My last soil drench feeding included these products along with molasses, silica powder, horsetail tea and 2tsp of Epsom salt. The following days showed some progression of burnt tips on leaves which leads me to believe that the Epsom salt is to blame and should be discontinued. The molasses should probably account for any and all magnesium the girls are requiring.

Current RH is 38%
Current temp is 82°F

The temps are another consideration. Will have to readjust what I keep my AC at. Would about 80-82° be ideal during the lights on? Everything I've read says max should be about 79°.


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I would raise the lights some more and maybe even dim a little until they get used to all that light.i prefer 76 to 78f for lights on and 70f lights off but thats just my sweet spot.@that ppfd those plants will eat like crazy.
 

Aruanda

Well-Known Member
I think from the responses I got then reading on the Northern Grow Light site that above 700PPFD you begin to see diminishing efficiency on output and this put me way over the top. Maybe if I had started with a fully amended soil and some other preparations I would have continued with the two in that space.
 

Evil-Mobo

Well-Known Member
I think from the responses I got then reading on the Northern Grow Light site that above 700PPFD you begin to see diminishing efficiency on output and this put me way over the top. Maybe if I had started with a fully amended soil and some other preparations I would have continued with the two in that space.

Like I said before use what you have brother. You arenin a position to experiment with a lot of different things. You can dim both down and use them and compare to one light on full blast etc. Lots of options now
 

Aruanda

Well-Known Member
I will be using a 2x4 as well and I was wondering how 2 lamps would work in there. Thanks for the test you did. :grin:
According to the site that is 919 PPFD in μMol/M-2S-1 in a 8sq ft. area for your 7th Gen Veros. Sounds about full optimization of the light, you and your plants will love it!


I miscalculated on my space, it's not 4sq ft. Forgot my tent is 80cm or 2.6x2.6ft so that comes out to 1177 PPFD in μMol/M-2S-1 in a 6.76sq ft. area. Hmm, maybe I should just continue ahead with the two at a dimmed rate (lol), measure the Lux on my phone and translate to PPFD to get about 1000 PPFD. Thinking 'aloud' here on my thread with everyone's input, I appreciate it.

To accommodate such increased Cal requirements, I'm in the process of making a calphos solution with bone meal and apple cider vinegar. I've been collecting egg shells and will crush and bake them (possibly along with powdered oyster shells for good measure) drain the apple vinegar and add white vinegar (which I think will work better) to the bone meal to do a second extraction along with the burnt egg/oyster shells for a calcium carbonate/calcium phosphate solution. This process should take a few weeks so maybe what I'll do is hang the second light again a week from now.
 

Aruanda

Well-Known Member
@robincnn the dimming function does work in this manner right? Reducing the PPFD in μMol/M-2S-1? When dimming the lights do you also reduce the power draw?
 

hillbill

Well-Known Member
@robincnn the dimming function does work in this manner right? Reducing the PPFD in μMol/M-2S-1? When dimming the lights do you also reduce the power draw?
Many of the DIY projects use cobs that are run softer and with passive cooling drawing maybe 50 watts. The cobs will be more efficient run softer and light will be hitting plants from many angles. You would want to make sure the cobs are arranged in a square as opposed to a linear fashion. These lights allow me to get within 12" with great coverage.
 
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