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It's time for the update on the ladies :weed: As mentioned before, it's crystal clear to me they love the new light I have increased the amount of fertilizer I feed them with yesterday It's now 6L water +8+8ml coco A+B +Aptus camg-boost 2ml @ph5.8 @900ppm I switch to organic vinegar for ph-...

Finally got some pictures :bigjoint: The lamp definitely needs improvements, but it's secure enough to operate. I'll keep refining how it's assembled over next few days next update on the plants! :D :peace:

you're absolutely correct fortunately for me I had every ready for this emergency -I picked up 4x 100mm fans from my secret jardin project. Heatsinks are now barely warm :-) I have some problems uploading the pics :S

I believe @Growmau5 is one of early adopters & pioneers in cob implementation for growing weed. however the priciples should be similar.

Hi Guys! Sorry for no updates! Assemblying this beast turned out more tricky & time taking then I anticipated. Yesterday I have finished the assembly & test run... et voilà! It's alive :D I thought it's going to burn thru my eyes to the back of my skull :weed: I have tossed the 250W HID setup...

Why would you want to power down for veg?

the sun

its true, I just dont have any available atm I just made a test run :D "Let there be light" wow im impressed and now also blind ;-)

exactly my thoughts. I have a strong extractor for 250W HID, it's already making too much noise & I dont want to get more. So passive seems perfect for me. Also it's nearly impossible to get a passively cooled ready made fixture. Also efficiency was important to me. With my top shelf cobs, my...

guys, I'm wiring my cobs now, but one thing is elluding me I have a Meanwell driver HLG-120H-C1400(B) + 3x cobs 3590 36v, but I have no potentiometer / dimmer. how do i connect the blue & white wires? I want 100% power

No problelm at all. There were several advantages over ready made fixtures: 1) adjustability - typically all ready mades are closed in a fixed box, ie. Mars Hydro. It contradicts one of the key advantages of LED: possibility to have equal light distribuiton over canopy. I have designed my setup...

I have bought cobs last week (cree cxb3590 3500k CD). All in all it cost me 100$ for 50W of led output, incl. shipping. You should also keep in mind the effort I put into assembly +I don't need to buy extra tools. For shopping go to Kingbrite at Alibaba. For heat sinks you got to make up your...

Several hours of work later, it's nearly completed. I didn't expect it would take this much work. And I didn't expect 3 broken drill bits. I guess I'm not very technicallly skilled :-/ I still need to wire it up, but I'm done for today. I hope I can test run it tomorrow. But first, got to get...

you make this all needlessly complicated. get rid of humidity tray, it's overmarkted bullshit. You dont need it for nothing. "4 days soaking in paper towel".. next time just plant it directly in your pot, will be much less hassle & much quicker overall. @Resinhound has given you excellent...

Good news! the heatsinks are finally here! I will begin the assembly today, maybe even fire it up for the first time :D I'm excited I switched off the heater yesterday and the plants look much happier today I will switch them to flowering almost immediately after setting up the new light.

All indoor growers use reflectors in addition to reflecting walls for many many years. The experience clearly says to use reflectors. That's the case with CFLs, same story with HIDs etc. Do you think something has changed since instroduction of leds or cobs specifically? It's always better to...

http://rollitup.org/t/lens-and-reflector-optics-for-cob.893660/

nice work on trimming those big leafs! looks very promising

I veg 4x Bubblegums in 2.5L pots, it's a regular strain. I planted it directly in the coco. I now water & feed it every day, manually. I use solution of 6L of water +6ml CocosA +6ml CocosB (Plagron) +1.5ml Aptus CaMg-boost @5.8pH @640ppm. I use fresh lemon juice for Ph-. There's a huge run-off...

My grow is a 1x1x2m tent (Secret Jardin DR100), there's a 5" extractor linked to 250W MH cooltube linked to a carbon filter. Got temps around 25C (77F) and humidity ~40% (that's because I got to heat my place, it's too cold outside). I got 6 LEDs CREE CXB3590 3500K CD and two drivers @1.4A...