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An easy way to determine whether it's a bad driver or an open led is to plug a known working driver into the two clusters. Just unplug one that's working and plug the suspect clusters into it. If they light up, it's the drivers. If not, you have a diode out. I've had some experience...

Thanks! My grow is small but its productive! In my state, as a mm patient I am allowed only 3 in flower and 3 immature. So to stay within whats allowed I just keep 2 in each veg and flower and 1 mother. The only way for me to get a great yield with only 2 plants is to get a little height and...

You're not an idiot! You did get a little overzealous though. Just give them a week or two in veg and they will look great. I routinely defoliate and recommend it but I'm really just looking to get light to every bud site or potential bud site. So if a fully developed big ass fan leaf is...

Here's the latest. The top colas are big, dense and frosty and the bottoms are not far behind. The time is near...

OUCH! That looks pretty nasty. Lets hope its an isolated thing like 1 bad part out of 10,000. Keep us posted on how Magnum handles the warranty.

I use a light rail. The light on the mover is customized with narrow 45 degree angle lenses so it needs to be moved to prevent light bleaching if kept close to the canopy. The result is super intense and penetrating light within an inch or two of the canopy with no bleaching. I can say that...

Just a bit over a week to go. The tops are dense and frosty and bottoms are almost bulked up enough. Reserva Privada Kosher Kush.

Cool! How do you intend to cool them? Here http://www.heatsinkusa.com/ is the best supplier of heat sinks I have found. That 1.813" wide is what I would use today if I were building a new bar type side light. When it comes to heat sinks bigger is usually better.

Glad to help. Post a picture or two of your creation whenever you get it up and running. I love seeing the neat stuff we diy sorts build.

I would use them especially if it's your first build. $68 is about what 20 Cree XTE or Luxeon ES would run. Those more efficient leds aren't 5x more efficient than the Epistars. More like 10%, maybe a bit more at equivalent amperage but not 500%. So, without breaking the bank, those 'cheap'...

Water cooling is an interesting idea. It would certainly be nice for driving leds at their max rated amperage. I'm not an ace welder or I might build myself one. I'd be concerned about leaks. When charged with coolant it would probably be fairly heavy as well. It would be doable. I'd try...

The second and bottom rows are 25mm wide x 10mm high. The long bars are 90cm, short ones 50cm. The third and top rows are cut from several 120mm x 90cm x 20mm high heatsinks. All of the heatsinks were bought off ebay. I am pretty happy with them as they get warm but not hot. I do have to...

The side lighting is all home made. The top two rows are all Luxeon ES leds with a small number of 3000k Cree XTEs all running at ~650ma. The bottom two rows are Chinese Epistar leds running at 350ma. As far as cost goes it wasn't cheap but then these are custom made. For me, the joy of...

Here are a few pics of the latest. It's two Kosher Kush girls with about 3 weeks left to go. I expect 20-30% more swell in the buds by the big day. The overhead light is on a mover. I like to keep it real close and keep it moving which gives me super intensity the plant can handle. I did...

You are very welcome Spotlights! I hope you can find it. If you can I think you will love how well your garden does with it. Another thing that I like about it is that it works well with H2O2 since it doesn't off gas like chlorine based preventatives. So, reservoir temperatures somewhat...

I recommend a product called Hydro Sparkle also know as Hydro Fungicide where its made in Australia. I have not had a single problem with root rot since I began using it. Its a non toxic reservoir additive which prevents any single celled organism from growing while allowing the roots to...

That's about right. The Blackstar 240 has 80 diodes. Assuming an average of 3v use per diode that's 240v. If they drive the leds a .55a it would work out to 132 watts. 240v x .55a = 132 watts. They may be driving the diodes at .5a which would be 120w for the diodes and the rest for fans and...

Ooops! My typo. I shouldn't medicate before posting! It should have read ~3v x .55a = ~1.65W Original post is now edited. Thanks for the heads up.

That's a pretty good ballpark figure! I build my own panels and had to learn the math to be successful. The equation is: volts x amps = watts used. Most commercially made Chinese grow lights that use 3w diodes run them at 550ma and the common average forward voltage of the leds is about...

Nice job Jimjim! Those 10 watt red/blue are an excellent choice! I might have to build myself one using some of those. They have a nice balance for flowering. When put together with the warm white XTE's as you have done your light should provide a good spectral balance. You might consider...