Couple of hiccups, but so far so good.
Problems:
- pH Perfect is BS, at least in recirc systems.... They guarantee it will work for 7 days, but after only 5 I was reading 7.0 pH. I also think their bloom formula is too high in N. I did a top feed and collected the run off, and the run off was lower than what was going in. So they were in general underfed, but showing signs of too much N (dark green, clawing tips). Anyways, I'm running Lucas formula using GH, calibrating my meter every week and using pH down... It sucks but at least my pH is good.
- Springtails.... they have not yet made it to my grow room, and hopefully they wont. They have invaded my whole house... I hired exterminator about 3 days ago and am seeing less of them. Really hoping they don't get in there as they will love the rockwool.
This plant was unhappy (about 4 days ago), due to pH, probably too much N, and a night of accidentally high humidity when I plugged the exhaust into the wrong timer. Her new growth is not clawed (the old growth still is) and she looks ok now, but this was her:
View attachment 1078597
Onto the good stuff:
I finished my CoB grow light, and I am very happy with it!!!
It is the best light I have had for sure.
It has solid intensity, and it is very evenly spread.
I get about 40k lux in the lowest points and 48k in the highest. These numbers should be above 500par across the whole tent, so I am definitely happy with it. It's actually a little higher in the corners than in the center, but just barely.
I used a different driver and different cobs, but this is the tutorial I followed:
https://ledgardener.com/build-led-grow-light/
Building the frame definitely taught me humility and how to curse. I had never done any work with metal before and it was definitely an experience...
I have done a few wiring projects before and this one was not tooo difficult because there was no soldering at all.
Here is the table before I got started:
View attachment 1078596
Here is the frame all laid out:
View attachment 1078598
Some of my cuts were not good... they were a little crooked and it made everything down the line harder. In the videos of the tutorial I watched it was clear the guy had done some of this stuff before as he made it look REALLY EASY... It wasn't lol.. not for me anyways. I spent probably 2 hours grinding holes I drilled to be bigger because I missed the actual spot I meant to drill despite measuring 3-4 times. Probably took me 20 hours total to put it together and wire it up.
Here it is with everything screwed on, and wired up:
View attachment 1078599
Here is what the bottom actually looks like with everything installed:
View attachment 1078600
And here it is in the tent:
View attachment 1078601
It pulls 300 actual watts from the wall, so a little more than 70 watts per CoB. I spaced them 24 inches apart which I feel was about right. At some heights it's more intense in the middle, and at other heights it's more intense in the corners, but it's never a big spread of numbers which I'm thinking must be awesome for a sog where plants take up the whole tent.
The girls are doing OK for approximately 11 days of 12/12 and 25 days of veg.
I'm flooding once a day right now and they seem to think that's OK.
Stretch is less than I thought it would be, not sure if that will be good or bad... hopefully they aren't done growing up, but at the same time I have had to remove some fan leaves to keep humidity down so that might not be helping.
Here is the group from the top:
View attachment 1078602
That's all I have this week, good luck in your gardens!