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What kind of heat sink you got? Traditional fin, or a newer pin design? Do the sinks have screw holes in the sides or face? If so, do you know what size the threads are? M3 X .5 mm is common. M3 means "3mm". Are you building your own frame? Using what material?

And let's agree that nobody tries Boatguy's suggestion, OK?

Um, yeah, I share Olive's concern. The most likely result of "tweaking" the breaker panel would be a house fire, so just put that out of your head. Besides, there's no point in pushing the house wiring anywhere near its limits. Forget about HID/HPS. Timber makes a 225W unit. Get two...

1200W (you mentioned two 600W HPS units) at 120V works out to roughly 10A. The typical residential wall outlet is rated for 15A. The consensus on the LED forum seems to be 35 to 50W per sq. ft. You have roughly 9 sq. ft. 9 X 50 = 450W. 450W at 120V is roughly 4A. Much safer than 10A. You...

Yeah, take a look at a Meanwell .pdf. There's a page called "Dimming Operation". With no resistance across the dimmer wires (referred to as "OPEN" in the .pdf) the driver should run at 102% to 108% of its rated capacity. With 100K ohms across the dimmer wires (in other words, you've plugged...

I read some advice on pruning that made sense to me. The article said to make your cut about halfway between the leaf and the "trunk". The remaining branch, the part you didn't cut off, dries up and falls away from the trunk a week or two later. This method was described as a way to avoid...

+1 I've built COBS from scratch before, using PC coolers and fans. When it was time to upgrade I just went ahead and bought a Timber kit. Coulda saved some money going with CobKits or etc. but it was nice to just pay one time and know someone else had done all the homework. To the OP: your...

OK, wait, wait. According to your original description: - These little plants are a month old. - For 3 weeks you were using two 250W LED's (brand unspecified). - You then switched to one 12W grow light. Or you added a 12W grow light. From your description, it sounds like you switched, but...

Isopropyl alcohol, but don't grab the first bottle you find. 70% is real common. Shop around for some 99%. If you're going to be taking things apart and putting them back together often, wouldn't paste make more sense than the pads?

+1 on both of the above comments.

Thanks for the links! How often do you apply the foliar during a grow? And if you don't mind, what are the proportions you use of the two powders and the water? EDIT: The Build-A-Soil website has some interesting articles. I'd never heard of it before.

15 C at night is a bit cold. Are these the same temps as before you started flower? You see what I'm saying; if the temps were this cold in veg, that's one thing. If for some reason it's colder now, that's something else entirely. If you went to 12/12 from 18/6, the plants are spending...

Evil - Foliar sprays make me nervous. Don't want to encourage molds etc. When you foliar spray, do you drag the plant out of the grow area? If so, do you let it dry off before putting it back?

RandomHero - What you describe - 6 36V 3590's - is exactly what Timber's biggest kit uses. Why not buy the same driver as the Timber kit? The Meanwell HLG-320H-C1400B. Get a pot for it and you'll be able to run the lights at just about whatever intensity you desire. You lost me with your...

Wouldn't hurt to change your password. While you're at it, make it stronger. I did, just this morning.

Jeff Sessions had the Russians hack RIU, and now they know where all of us live.

Great, I finally accrue enuf COBs to light the closet and you guys come up with something more efficient.

Pet, you're splitting hairs. You didn't say "Timber is crap", but you clearly inferred that your advice (buy Amare!! RIU discount!!) was superior to Danielson999's recommendation. Then you argued that Danielson hadn't used Amare so he had no authority to speak. He turned that argument...

Can you provide links to support this statement?

What do you mean by "working backwards"? Are you referring to packing more and more wattage into a box rather than spreading the devices out on an open frame? If so, +1.