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OK, well, I guess I shoulda stated that it's my personal preference to run COBs soft and stay safely in the "passive" end of the pool. 110 watts per COB on pin sinks that are rated for 75W tops is something I just wouldn't do. You're relying on the fans to prevent meltdown. As long as...

+1 on ThaiBaby's comments. Pin sinks are more effective than fin. I've disassembled the half dozen active fin sinks I was using and going to passive pin sinks. Pin sinks have their limits! You can't run COB's hard on passive pins. There'd have to be some dedicated air movement across the...

Mazer, thanks for bringing this up. I think you've identified an emerging trend. I'll be very interested to see what comes from the reputable manufacturers. Apparently Citizen is already there, wonder what Cree comes up with? I did some rough calculations from the Citizen spec .pdf. It...

"Deal of the Day" is a DUD. Let's see. 1000W (and we all know wattage is just about the least relevant benchmark, right?) for $150. WOW what a deal. What's a "Double Chip"? When the ad says "suggested working time: 10 to 14 hours a day" does that mean this thing can't handle 18 hours on...

slow, what else you got goin' on in those grow bags? It almost looks like plain old bedding straw as a mulch? What kinds of plants are those peeking out from underneath the girls?

I'd never heard of those AC Citizens before. Amazing. The AC COBs don't hardly look any bigger than the "normal" COBs. How do they do that?

Could you re-phrase your questions about dimmers? What do you mean by "it's wired to three separate drivers"? Do you mean you have one pot controlling 3 drivers, or do you have one pot per driver? This is just my own personal preference, but I like to dim the lights a little bit for a day or...

Then it's not a driverless COB. I can visit my local Home Depot and fill the cart with LED bulbs that will screw right into a standard Edison light bulb socket. Every one of those LED bulbs has a driver hidden inside. So an LED bulb that screws into an outlet is not something remarkable. A...

Wall power is AC. LED's need DC. AFAIK there's no such thing as a driverless COB that plugs directly into the wall. But there it is in your screenshot: "No Driver" is one of the features. Take a look at the spectrum. 5500K to 7000K? 7000K is almost off the visible light scale. Typically...

+1 300W, or two of the 200W kits. If the money's tight, buy a 200W kit and immediately start saving for another. Don't short change yourself! You'll never regret having a little bit more light than you need.

The worst thing about this, in my opinion, is the time wasted. Think about it. Most closet growers probably don't know a bunch of other growers. Their grow is the only one they know. They'll bang away at it, grow after grow, using lights that will never give them the yield that high-quality...

3500K for the Crees. I asked the same Q a month ago.

Our well water is mildly hard, which means it's got some calcium and magnesium ions. Plus I was adding Cal-Mag. Even so, I fought leaf necrosis very similar to yours. For the second grow I re-used the FFOF soil from the first grow. The necrosis came back with a vengeance before I could even...

I'm sorry, but it's just silly to be counting your ounces before they've even hatched. Spend your time and energy on something you can control. Like how happy you can make these plants. They're depending on you for survival. Talk with them, pay attention to them. Get them some modern COB...

I bought a Timber Kit. I was inclined to use wood just because I'm more familiar with it and have more tools. Ended up buying 1" X 1" X 1/8" aluminum rail at the local metal shop. Used a Porta-A-Band to cut the rail, then a few clamps and a drill press to drill holes for screws. With clamps...

robin, I thought I was beginning to understand these drivers. I thought "HLG-320" meant 320 watts was max output. But you're saying 390 watts at the wall. The driver's not consuming 60W, is it? Also, how exactly is this one wired? It's always helpful to give the specifics when describing...

Everybody's got their opinions on watering. I like to grow in fabric bags. Place a hand against the lower part of the bag - if it feels cool to the touch and a little bit damp I figure they're good. I water when I think they want some water. I don't wait for the top 2 inches to dry out...

These are clones? My guess is they're gonna look shocky for a few days at least. Temp, humidity, pH, etc. all appear to be within the bell curve. If it were me, I'd knock off the nutes until they're moved into bigger containers.

I don't think the forum allows brand new members to post pictures, does it? Don't you have to post ten times or something like that?

Yeah, nfhiggs, I noticed the white light pouring in from all around, and as you say, it looks like a cheap little outdoor greenhouse. I assumed it was still indoors, maybe because of the plywood floor. There's nothing really to indicate that it isn't outdoors. If it is outdoors, the plants...