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Ah Chaos beat me to the question, lol. So what's the output from each of those fixtures and what driver are you using? I'm subbed, these QB's look like another great improvement in LED lighting (too bad I just spend over $1500 for the 5 light bars I'm going to build, lol - oh well it's only...

But if using a larger pot than the settup needs, does that negate the need for low-limit resistors, and wouldn't adding them create the problem that the other dude ran into with it not working? And agreed, I think that I would probably just run my lights at 100%, UNLESS it somehow turned out...

Btw, in the instance above, if you do hit 100% output at say 90% on the pot, is it correct to assume that turning the pot all the way on that you could "overclock" the driver and maybe burn it up? If that were the case, to avoid accidentally doing that, maybe there's a way to rig a stop on the...

Thanks Bassman, I keep forgetting about the tolerance, but, while that was my thought initially, when I read further it seemed that the guys were recommending going lower and then ADDING a resistor to make up the difference. I can't find the exact post, but as I recall someone wanted to run 7...

Well hell, so I was trying to understand what SDS was saying on his tutorial on dimming and now I'm confused (again, seems to be a perpetual state of mind when it comes to this stuff). If I use a single pot to control 6 drivers, to find the right pot do I have to divide 100k/6, in which case...

Okay, if I understand this (only marginally, lol), if I'm running six HLG 320H-54B drivers, I can wire all the dimming wires together and control them with a single 100k pot and a 10k resistor? That certainly would simplify things so I don't have to individually adjust each light bar. EDIT: So...

Yeah, I know that, but this room is just being used for vegging, and it's right above the flowering room in the basement. The basement is unfinished so I have been diverting the forced air from that room downstairs to heat that area, and with the temps outside dropping to the low teens to...

I have a question about the type/size pot to use with the HLG 320H 54B, I still haven't figured out how to match these, and the same goes for the resistor, I made a note about that but not much else, lol, so not sure how to "size" that either. Any suggestions are appreciated ;?)

I agree with the organic solution, all the work is up front and then just manage the watering. There are tools for the visually impaired like talking thermometers and there's a soil moisture probe that chirps when the soil is dry. My dad was blind the last few years of his life and we tried to...

Well my beef with Paypal goes back about 12 yrs when I was a seller on eBay, lol. And call me stuborn, but when I swore I'd never do business with them again, I meant it, and if they were the only online payment system in existence I would just pay by check or m.o., they'll never make another...

Well I don't have a PayPal account, refuse to deal with them due to a dispute several years ago. I'm assuming that they want payment from/through PayPal as opposed to paying with a credit card through PayPal.

I have a question regarding dealing with Kingbrite. I'm dealing with one of Jerry's minions, her name is Vivi, and she saysin order to complete my transaction (for Citizen COBs) I can't use the Alibaba site because: "Order from alibaba is not available, because 'CITIZENl' is not allowed to make...

So for the 5 fixtures I had figured on using another 30 COB's, 6 each per 4' bar, and 5 drivers. I've never dealt with Jerry before, but are his prices lower (think I read somewhere that they were, dk). And yeah, I'd rather not wait too long, so one reason I was looking at Digikey is that...

Ah, just saw your post, I'll read through it and see where that puts me budgetwise, thanks again ;?)

Also, what do you think about mixing 4000K and 2700K to get a broader spectrum? My original plan is to put 6 COBs per bar with 3 of each per bar. Also, which model of Citi 1818? There's quite a few to choose from on Digikey, but thinking going with the higher lumen per watt?

Thanks Qballizhere, but I think you may have misread my post, or maybe I'm not clear on what you're suggesting. The light bars are just a 4' long rectangular sealed tube with water inlet/outlets for water cooling. So if I get your drift you mean 8 COBs for a 4' x 4' area, or is it 8 COBs all...

Hey guys, well I've been buried under work and personal crap for the past couple of months, so aside from tending to my current project, I haven't had time to follow up on my COB light build, other than getting all the piping, pumps and aluminum tubes rounded up for the water-cooled light bars...

So time for an update, I've been running my water-cooled proto-type for almost 2 months now and so far so good. I've got it hooked up to a 5-gal bucket with a fountain pump and as long as I keep a fan on the bucket, it keeps the water in the 70's (ambient temps are a little cool at 65F). The...

Still looking for any advice on the amount per gallon, but looks like not too many peeps are using this for the aforementioned purpose. Well I'm FINALLY getting around to taking some clones, but that's because I've had to do battle with that old fungal enemy, LEAF BLIGHT, grrr. Unfortunately...