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Are there swamp coolers that small? Or a DIY solution? I have a humidi running outside the intake vent, but have a feeling i'm just pulling the cool moisture right out the exhaust, which is at max right now. Edit: I wonder if this DIY 'baby sampy' would be practical for my scale.. Also how...

Light installed into tent. >> Album << Temps are a bit high @ 1.4a. ~102-104*F in the heatsink even with fans upped to 12v (only lowered temps by 3-5* going from 6v). ~80-88*F near canopy height.. Driver temp @ ~90*F+ is also higher than I anticipated, with an oscil fan blowing across it...

These? 2.1mm x 5.5mm CCTV. Also, likely not rated for high voltage? I got them for fans initially. 10x were cheap. I'll likely convert to something with a solder-on / pig tail design instead of the screw downs.

I'm trying to finalize my wiring and as I may have mentioned above, I plan to run the driver it remotely/outside tent, preferably on the cool floor. I'm using/have in my posession ~100' of 18g copper wire that I'd prefer to use, unless absolutely not recommended. Is it likely preferred to keep...

Light rig complete. Doing a test run now. Heatsink temps are lower, but still ~100*F. Warm to touch, not hot. BUT, 2 of the LEDs are heat soaking my glass table ~8" away, glass temp was ~115*. :shock: So, still not sure if I have a cooling concern yet. Will see how it performs in the tent...

Thanks for the replies all! I am awaiting arrival ph calibration solution, as well as EC solution. My ppm readings, using the cheapo TDS-3 meter. I'm not sure what scale it functions on. But, some of my recent ppm readings from run off are: 11-29 1320ppm (tap water, which is in the ~160ppm...

I've had this Plink (Pinkberry x Blue Dream) going great from reg seeds, currently day 21 flower. Medium; FFHF + FFOF + perlite + dolo lime + mycos powder (see below). 1 gallon plastic pot (Yep, too small, but a bit of an experiment as well.) Fox Farm Trio nutrient line; Big Bloom, Grow Big...

Oh, by vert I thought you meant stacks of racks with multiple bays 2-3+ high. This is where LED has an advantage, as long as plant counts are non-issue. :) 2x (or more) the number of plants in the same space, instead of 1000w with huge canopy distances. Still in search of yield/density...but...

I've been meaning to check your Vert grow out! Working on some of that at work as well. Thank you for this effort! I'll def be checking in on your project/grow. Update on the hot heatsink issue, updated above post: I think this has to do with the sinks being on their sides and the light heat...

I was testing w/ lights on, and the sides right next to/behind the cobs, not in direct light. I tested them as soon as I powered off as well. And, hand test indicated warm-hot. I'll get an extra hygro to confirm temps tomorrow night. Thanks for the tips on laser thermo. 86-87*F in the tent...

Just finished tapping 2nd pair of sinks. Attached COBs, wired fans and chips up. Just back from a test run. >> More pics << First issue seems to be the fans at 6v is not enough to cool this heatsink.. I'll find a 12v adapter and do further testing. Using a laser thermo I saw temps up to...

Maybe there was some talk about it above, but I'd highly suggest 99% ISO for a task like this. It works great for cleaning sinks and other PC electronic components. Avoid the watered down 70% that they have to sell to the masses in stores. I did some searching and found some 91% at a local...

I feel like I could have used a larger tip and had a bit more thermal reserve, I was using my fine tip which is great with smaller gauge DC wiring. I definitely need to get some flux, having a hard time 'tinning' my tip, which likely caused some of my issue.

Just another guy jumping on this high efficiency COB bandwagon. I've been dabbling with some cheap-CN 100w chips for a bit, and seeing great results. I've ran a cheap-CN 180w UFO LED (92w draw) and wasn't all that impressed, lots of heat, required a large distance to canopy, lack of...

Thanks Supra! I actually got a lil zap @ 144 when I was testing voltage haphazardly. Reminded me I'm not working with 12-24v anymore. :) Nothing like what 120vAC feels like when using you as a conductor however.. I've seen this confusion (2 chips on a 185h-c1400?) in other threads, I'm glad...

Very interested in your results. Your in a ~3x3x3'? 9 sq ft, 9 chips, that should stomp. I'm also in a short 2x2x3' and building a B3590 setup @ 23-49w * 4 (700-1400mA). Should have some power if I need/want/am able to manage heat. :)

OK, I follow your math..assuming the driver would allow a voltage of (34.9*2) 69.8v instead of its rated min. of 71v. I think this would work 100% fine with 3 chips because it would then be well within the spec of the driver and running in the 104.7v range. Maybe it would just run in some sort...

Without potenti, correct. I don't really want to try and burn up $90 in chips..but, if I'm crunching numbers correctly, it shouldn't be too concerning. My calculations are from the drivers minimum voltage spec (71vdc). If 71v is its minimum voltage output, 2 chips will be getting 35.5vdc...

Hello, can any driver & COB savvy person confirm for me that I'm safe to run 2x CXB3590s off of a MW HLG-185H-C1400B [71-143v] (w/o a resistor connected; so full power). It should be 71/2 = 35.5vF per chip, correct? At 1400mA, 49.7w per chip? I'm wondering if I can do a quick test-run with my...

I like the 5x 3590 @ 1.4A idea.. maybe a 5000k for the center to help manage stretch and provide some good lm? I also like the 4x @ 1.75A CXB3590/3070 option for ~250w (if I'm understanding/mathing it correctly). To maybe get a bit more coverage/PPFD from fewer chips in a 4x4, 8 chip configuration?