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littlejacob - With the "Search" function you can find some of my older posts, where I went on & on to the point of annoying people about how to use the Ideals. I haven't kept up on what Ideal offers, so I don't know if they have holders for the latest COB's yet. The Ideal holders I used...

Clearly the OP needs a safe, reliable, simple method to test his remaining COB's individually. I'm not sure what to suggest, other than buying a small driver that's only capable of sparking one COB at a time. Is there a safe test method using a couple of batteries? I didn't think you could...

The A-51's use high quality diodes. Because of that I'm guessing driver or fan failure is more likely. Fans would be easy. As long as you understand what voltage and current you're after, driver replacement should be relatively easy too.

Clearly, it does NOT have to be just as I say. Your lights light up when electricity is applied. Who knows how many other folks are growing right now, as we speak, with this poor hardware combination. They may get just as many years of life as a "proper" installation. I emailed an Ideal rep...

ARRRGH :wall: The COB holders are installed incorrectly. The metal dimples are hanging off the sides. These Ideal COB holders rely on a sink large enough for the two metal dimples AND the two white plastic nubs underneath the wire clips. If all four contact points aren't touching down on...

This article http://www.designingwithleds.com/the-new-cree-tw-series-led-t8-review-and-teardown/ was very helpful and addresses some of the questions posted above. But the article makes clear that your total efficiency is hobbled by the old ballast. No matter how efficient the LED tube...

What kind of timer do you guys use when you have these red lights set to come on for 10 minutes or so right after main lights out? I've often wondered about that. I assume it's gotta be another timer, independent of your main lights. Seems like one problem would be the two timers slowly...

YEs, am I particularrly wanted to by num3rous cases of specificly the TUNnel lighting effects :hump::peace::mrgreen::blsmoke::dunce:

Uzzi, did Newark gouge you for delivery? When I ordered from them a year ago they charged $14 for Priority Delivery or some such nonsense, but I mighta missed checking the Super Saver box.

I'm sorry, I didn't explain what I was going after. My suggestion on shrouding was to make sure that the cooling air generated by your fans is pushed along your fins instead of dissipating out into the open.

That's a lovely little garden. The RW75's are an awesome size for the small-scale grower.

Distance from canopy is something you'll figure out on your own. Some guys want to pull them away, almost like a high intensity discharge light. Others move in with their lights. 6" to about a foot seems to be working out OK for me Wouldn't surprise me if you find that you prefer X spacing...

It won't. Don't spend another second worrying about that.

BlueBrother - I'm gonna quote you from way back in Post #40. "Now I'm that far gone in producing par with hids the only way I'd switch to led would be for more yield." IMHO you've pretty much answered your original question. It sounds like you've already got a good system going...

sds, I had to google Acinonyx jubatus. Then I had to think about that for a while. You are one inscrutable dude.

Supra - Do you think we've gotten to that point? I've been hanging around here for a while and it seems like most folks still aren't willing to say that LED can beat the others. You sound pretty confident!!

Supra - Don't you ever leave. You're stuck here now. We all depend on you to show up with all those calculations that nobody else knows how to figure out. Well, I don't anyway. :)

I'm not an experienced grower. I don't have any hands-on experience with HID/MH. However, I think I can forecast the way this is going to go. You ONLY want to talk about yield/area. Electricity, heat, ventilation, ROI, etc. are all excluded. Considering the nature of your question, I don't...

No, agreed, don't throw it away. I don't know anything about the Magnums first-hand. Do you have any control over LED intensity? If so, do the fans ramp up & down along with the lights? Perhaps the simplest, cheapest work-around would be to give up on the highest intensity(ies) and just run...

Replacing the cheap fans with high-end fans (you could spend a bucket of money on Noctuas) is unlikely to make much difference. Most of the noise is probly because they're spinning so fast. From the manufacturer's viewpoint, big heavy heatsinks are expensive. It costs nothing to just spin...