hash time!
I prefer my Sativa's. But I kinda wish i could cut something down in 56 days. but it wouldn't work in my system with my tall ass 10week girls so a minimum of 70 days it is for me. When I upgrade my light I'm thinking of running multiple tables like the one I have so I can run more than one genetic. My sativa are selfish and don't get along with anyone but each other. Cliche bitxhes! lol
Happy harvests brotha! Make sure you post some updates in my "led grown" forum
Hello
Nice pics lots of beautiful girls...
Like i said, i want to "practice" on a dozen V10 5000k on small cpu cooler (55mm) but I'm not sure what hlg-60 i should buy!? Can you tell me please?
Have a great day★
Great thread Bueno you've got some fantastic growing skills on show not to mention your wry impressive electrical knowledge too. I hope these questions haven't been covered before but they probably have and I've overlooked them bu here goes anyway
Is there any other led drivers that I should be looking for online other than mean well ones? The reason I ask is I'm based in the UK and while I can find MW ones there's also cheaper unbranded ones on the market, I assume these will be very inefficient so is there any other options I can look for. Can source the other bits so that's cool.
You can find cheap LED drivers for whatever your intended LEDs of choice require, you dont NEED MeanWell or other brand name on it. If you want to save some money and can find something that will work cheaper and regionally available go for it. You have to be careful with some cheap drivers not performing to specs but generally they will perform to the rated specs they provide. Its best to test them though with a multimeter to make sure your getting the rated current and voltage to be safe with a cheap or no name generic driver.
I'm going to build a cob unit in the future to use in my 30cmx 60cm veg/clone cab how many cobs could it hold in there? Right now I'm running a large cfl and led floodlight I got for free and it works well enough but I like to try new things (much like you)
30cmx60cm is roughly 2.8 sqft and wouldnt require much wattage for veg, quantity of emitters would depend on the size of the COBs you choose and the drive current/wattage of each, for example less CXA/CXB3070/3590/Vero 29 or more smaller Cree or Vero COBs like Vero 10s or 13s or similar. Id recommend more emitters running at less current each for limited headroom applications so you get a good spread with the fixture closer to the canopy vs if you have enough headroom you can run less more powerful emitters higher over the canopy to acheive the canopy coverage needed.
If the cobs work out well in veg I'm planning on converting from hps to cobs in the flower tent also which measure 90cm x 90cm x 180cm any ideas about the number of cobs it could hold too? I'm based In a garage so there's plenty of air flow and it helps keep the temps low.
90cmx90cm is roughly 3ft square and ~9 sq ft, to keep it simple (for us non-metric folks forced to use our own stupid system of measurements, haha). You can acheive quite good results in flower with ~30-35w of efficiently run quality COBs (Cree or Vero) but you could certainly run more if you wanted I would suppose with somewhat of diminishing returns after some point, not sure what that point is probably depends on the whole environment and setup as a system and would vary in different peoples grows. So ~300w would be a good aiming point and possibly up around 450w or so, close to the recommended 50w per sq ft with HID that people like. You could acheive a good light spread and ~450w of LED dissipation (actual power draw and use would be a little higher depending on driver efficiency and fans for cooling, etc) with 9 Cree CXA or CXB 3070s if you can find them or Vero 29s you could run them at 1400mA cheaply and have respectable efficiency, plenty of light output and intensity. At 1400mA 3070s run ~52w each so that would give you almost 470w total with 9 COBs and be plenty if not almost too much light for a 3x3 tent, if you can find a dimmable driver that is reasonable in your area I would recommend that so you can turn your current down to dim your light intensity if needed since 50w per sq ft is a bit overkill IMO with these new quality Cree and Vero COBs.
You could also run fixed current drivers that run around 1050mA for ~38w per COB ~350 total for 9 and would probably be enough light for your area. Hard to say there are so many options with DIY thats one of the best parts IMO you can build your lighting system tailored to your specific application. Id stick with the Cree 3070s or Vero 29s if you want to keep the build more simple, 3590s would even work well Im sure given a lower drive current or more height over the canopy to allow good light spread.
Finally how high above the plants do you leave the cobs when operating fully I'm guessing around 9" to 12" is about right, lifting a lowering as needed.
Probably around 12", maybe more or less depending on how the plants are liking the amount of light, if they are yellowing from the intensity back the lights off some and vice versa. I can keep my new Vero10 fixture a lot closer to the canopy without the plants suffering, due to the more even spread of intensity with so many small COBs, whereas with the CXA3070s I would get yellowing under the center of the COBs when kept too close from the extreme intensity in the middle area of the emitted 'cone' of light that you get from COBs (and other LEDs in general). Also you might find you need to raise the COBs a little to get a better spread of light over the entire canopy of your plants but 12" is a good starting point and you can adjust from there easily to dial it in for your setup.
Great thread mate it's some excellent reading, keep it going for us all