Long time reader first time grower

He should have something you can use without getting into high end horticulture specific lights. 2’ x 1.5’ shouldn’t be a problem.

Are the internal dimensions exactly 24” x 18”? A half inch more or less could open or close different doors for you. And I can definitely walk you through a build this size step by step.

My veg room is 450Wx910Hx440D millimeters or 17.72x35.83x17.32 inches
Flower is 630Wx450Dx1200H mill or 24.8x17.72x47.2 inches or 2.3x1.4x3.9ft

Flower room is main concern as i will be trying for “perpetual” system and it will have plants at various stages all needing good light penetration and coverage. Hope to have 3 plants on rotation so it’s month to month harvest

Just curious also can you use 2 hps in single ballast if they are both 70 watt and ballast is 35-150 watt capacity?
And i got give aome led downlight/spotlights at 3000k each being ACTUAL 8 watt, would these be ok as side/suppliment lighting?
Numbers on packet and drivers are
Rear mounted driver Input: 220-240v~, 50-60hz. 0.05A
Output: 24-48VDC Constant current:300ma
Then has Ta=40c,Ta=75c.
Brand of light is OUMA Model number OM0S12N(text fuzzy but think thats right)

Also what does the Ta mean? Is ir like a thermal efficiency rating? Ie lights operate at optimum at 40*c or something like that?

@DoobieNoobie would be possible for you to get large exhaust fans and extract to another room from what i understand mass air changes can do just as good as ac, depending on your own setup etc… they use air exchange to regulate industrial ovens etc.

@Sixpackdad My water, runoff and medium are all 6ph, should i aim for the 5.8 mark?

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Yes, 5.8 is ideal. 6 isn’t bad at all - it’s within the hydro/soilless range for pH. Just start watering with 5.8ph and you’ll be good. Measuring total dissolved solids (TDS) is the next step in measuring your water/nute solution and the run-off, especially as you move into the phase of adding nutes. This is a cheapo, but I like this brand for both TDS and pH devices.

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That’s an interesting idea. I’d need to know at how high of an exchange rate I’d need to be sufficient? But I question whether the noise from the fans with that much air exchange would be louder than ac? Cheaper I’m sure but noise is also a concern.

Two bulbs with one ballast can be done but requires special components that would likely not be reasonable for a grow that size.

I’m out with some friends for the evening but I’ll try to take a look and see what cutter has so we can get an idea of what you’d be looking at.

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I would think noise would be possible issue however there are some low dba fans that can move around 70cfm without filters or any restrictions pcgear do a couple good ones at 15-17dba 120mm/5in?

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Maad got one on the way… Although I think I screwed up with the hot medium as 5 of 6 are looking pretty sad and unlike they wanna continue. :sweat: and no seeds to start fresh.

Hoping i can get atleast 2 so I can breed and get more beans, not too sure about ordering any online, aus is pretty strict on that stuff

Gotta pic?

The 2 in tube stock pots in attempt to save, last ditch effort and 1 in black pot sorta sitting sad so not touching it see what happens. Other 2 not as sad in room under single 150w cfl at 20/4 in hope they may slowly come back enough to breed if lucky enough… impatience and personal stupidity caused this. Rookie errors.

I should note that I have managed to aquire some clones of same strain they will arrive tomorrow all things swimming well. Will see what these 2 do but start slower ànd steadier next time, perhaps get advice and understand what i am reading and looking at before thinking ‘‘i got this’’.

@dbrn32 LED is a definite NEED as heat gets crazy in there even with door cracked ajar. Got to 30c on our first hot day here, not even summer yet.

@Sixpackdad thanks for the tds ph pen tip tòo

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All of them are now in a coco based soil? How often are yo watering?

You got this :slight_smile: . This will all work out. I did horrible things to my first grow and managed to reap a good harvest.

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Only watering when pot feels light and after gently checking near base of plant for visual moisture and finger test. Still only tap water

How long have you been growing?

I have been growing for a little over a year, a little bit after growing and recreation use was legalized in Massachusetts, and am on my fourth grow. Here’s my first grow journal. My plants were fine until flowering and then things went south. But in the en they made it through their struggles with the help of the good people on this site.

Now that you are in a coco based soil, and its’ well draining, you can water through to runoff. I said above to be careful of overwater, but I think they look big enough in your latest pics to handle it. In my coco, I water every other day regardless of what the moisture feels like. I did this based on some of the stuff I read that was put out by @garrigan62.

You will want that pH to be 5.8 though and it sounds like you are still waiting on the pH pen. What’s the ETA on that?

Just finished reading your wwa first grow. The lst and guessing fim/topping(4 way i think i read a tutorial like it) Seems to have worked alright
Gonna read through your others when i get time, I like your notes of potential mistakes had to go back and reread first post/log few times but seems like i had same fear as you with over watering a bit.

Have litmus strips as inaccurate as they are but tds and ph pens are meant to be here on the 9th according to tracking

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Ok so update time, my clones were cut yesterday so hopefully the 3 root. Am keeping them under clear propagation tray lid and spraying 2-3 times a day so far, is this the correct method?

And thank you heaps @Sixpackdad i watered to run off and plant seems alot happier

Looking at building led just wondering what peoples thoughts are as to what spectrum, brand and simple diy advice is???
. It will be for flower room in a 2x1.5 cabinet with 3 small plants at different stages of flower, not scrog maybe more sog.

I have been looking at the cree cobs that look like a star/flower kinda thing or philips lumiled boards and supplimenting the white with some 660nm, UV and IR.
I can’t seem to find a solid foundation or answer that makes sense, is 2700k or 3000k better? And who has the highest CRI vs Lm/W??

60 air changes per hour is a recommended rate on summer whereas it’s more 12 per hour in winter, i have only read this though not yet tried it.

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If you’re limited height go with strips over cobs. If you use something like 3000k-3500k 90cri would eliminate needing to add 660 and ir. And if you want to do uv, I wouldn’t bother with anything other than uvb. Highest cri doesn’t really do a lot for you under every circumstance, so pay attention to the distribution graphs.

That leaves a couple options from cutter, plc strips, or Phillips fortimo that I know of in pcb mounted.

Hey mate, thank you for your help so far and steering me in the right direction
I found a pcb product through one cutter, was thinking 5 of these with dimmable option the hlg drivers seem to be on everything so will go with a “b” series to locate the pot and driver stealth but accessible.
So would i look for a “constant current” driver rated for 240v(5x48v boards)@1a?

The data sheet for j series cree shows a “dip” between 450-530nm and drops off quickly after 660ish, would a supplement be needed or is this reasonable enough?
The website states they can run at 1amp and get 50w with heatsink

  • 560mm x 15mm x 1.5mm, Aluminium Metal Core PCB
  • LEDS Cree J series JK3030, 190 lumens per watt, 3000K Min 90 CRI
  • Forward Voltage 48V
  • Drive Current typ 500ma, max 1200ma
  • Lumens: Typ 4500 Lumens at 560ma, 9000 Lumens at 1.2A

Will also get a small uvb board, would that be better set periodicly?

I’m just starting flower now of my first grow. What kind of issues did you have in flower in hopes I can avoid them? I’m growing bubble gum,Jack Here and OG Kush ~ All auto’s in a soil/perlite mixture. Doing pretty decent so far, just curious of what issues you had since that is exactly where I am at. Thanks.

I overnuted and had plants with wildly high ppms in the run off - 4000 to 7000. I also wasn’t PHing right (5.8 for coco). I also wasn’t watering right for coco, not watering to runoff and not frequently enough. See what I did to my plants-they survived thanks to the help of good folks on this site. Good luck


I caught myself early regarding not watering to run off and testing. Ive got that figured out. I had also used Miracle Grow and had been using Fox Farms nutes less than 50% solution of the recommended. I started to see some issues and immediately flushed them till I had 6.2 coming out. (About 4-6 gallons per plant). Thanks for the reply