Emilya Green
Well-Known Member
lets be totally clear what we are looking at, and get a light measurements at the top of the canopy for each of the grow locations. I am suspecting more light being seen in the reflective tent, but lets see.
Moderngroroom Soil Critical Purple Northern Lights Grow Journal
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moderngroroom
Well-Known Member
35 inch from the bulbs to the top of the tallest cola.
Emilya Green
Well-Known Member
no... not what I meant, although that does seem to be very excessive. I mean a light meter reading... Do you have a lux meter or at least a cell phone app where the two can be compared?
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moderngroroom
Well-Known Member
No i dont ill look for the cell phone app
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moderngroroom
Well-Known Member
5200 lux is what im getting
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moderngroroom
Well-Known Member
10,200 lux in the middle
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moderngroroom
Well-Known Member
265 PPFD in the middle of the canopy at 35 inch
Emilya Green
Well-Known Member
so one is getting a whole lot more light than the other. which one is which?
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- #2,009
moderngroroom
Well-Known Member
All those numbers are for the tent where im having problems 55ppfd in the room that is doing fine 4800lux
Emilya Green
Well-Known Member
ok, we have it figured then. The room where things are fine is enjoying 55 ppfd. The tent with the problems is getting 265 ppfd, even at 35 inches.
Clearly the tent plants are getting way more light, and they are working way more harder. They need more nutes than they are getting. The ones in the 55 ppfd are cruising right along, with less light, enjoying the nutes they are getting because they are not working nearly as hard. Increase feed in the tent with all the light... keep it the same in the other area.
Clearly the tent plants are getting way more light, and they are working way more harder. They need more nutes than they are getting. The ones in the 55 ppfd are cruising right along, with less light, enjoying the nutes they are getting because they are not working nearly as hard. Increase feed in the tent with all the light... keep it the same in the other area.
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moderngroroom
Well-Known Member
Yeah that’s exactly what is going on, never thought of that.. its done it to my girls everytime in that tent. Even when i had the optic 4 in there it did the same thing burn my leafs. You can go back in look for the past 4 grows in the tent it’s happened every time. So up my feeding and it should be fine?
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moderngroroom
Well-Known Member
Im also going to buy a light meter thanks for the help so much.. i learned alot in just a little bit of time. I guess its the reflecting material that is causing the more light intensity? Been fighting this problem for 4/5 grows
Emilya Green
Well-Known Member
I see this happening in my bloom room. It is a large 6'x14' room, mostly covered in reflective mylar. I have noticed that plants that sit in the back row, where the 3 walls closely surround them, always do better than the plants in the front row, closest to the open rest of the room. It is such a dramatic difference that I am strongly considering a reflective mylar room divider, to give that front row an artificial reflective wall.
Emilya Green
Well-Known Member
or balance out the lighting a bit better... you are looking at a 4:1 difference.
Sorry for missing the tag MGR, I've been off the site for a week or so. Looks like Emilya has you well in hand!
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- #2,016
moderngroroom
Well-Known Member
Yes sir she has been great help! Lot
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moderngroroom
Well-Known Member
Yeah same on mine to the 2 back plants do better then plants in the front
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- #2,018
moderngroroom
Well-Known Member
What do you all think about UVB lights.. do they work or are they just a waste of money.
Emilya Green
Well-Known Member
I believe that at this moment in time, we do not know how to properly use UV light. I am going to experiment with adding UV only around the noon hour, matching the peak we see in nature around the same time. I further believe that adding UV to a light system that runs it full time, is detrimental to the grow.
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moderngroroom
Well-Known Member
Ok im going to buy 2 of them. Is california works a good brand? Which one did you buy?
