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Found that supplier! http://www.abl-heatsinks.co.uk/index.php?page=extrudedproduct&product=186 they have a £250 min order but if you are looking for 12 x 4 ft bars they supply RS but RS only stock it as 4ft lengths, these guys will cut to your spec and if you give em a drilling plan they can...

I've stuck 400w force cooled onto one 4ft bar and been under junction temp max. If I was strapping 4 29's actively cooled to those bars I'd run em at 300w at least, my latest build using those bars and 3 x 29 se's took 300w and ran barely warm to the touch, in fact it ran so cool i never...

I use these; http://uk.rs-online.com/web/p/heatsinks/8805960/ @£30(ish) each. However for that many you will be over the £250 min order of their suppliers, I've got their contact details here someplace I'll dig you it out when I get 5 mins, its round here someplace.

**Medical Marijuana and MS For this study, the researchers isolated immune cells from paralyzed mice and treated them with either CBD or THC. In both instances, immune cells treated with either CBD or THC began to produce fewer inflammatory molecules, including one called interleukin 17, or...

That's a bit of a 'how long is a piece of string' question, if the 5 were me and my 4 grown lads, I'd stick the whole 6g in but we are all hardened tokers and find getting entirely munted to the point of clinical intervention 'a great laff'. It very much depends on who the 5 are, their tolerance...

A huge subject, about which many consider me an 'expert' but personally I'm more the blind man who has spent time familiarising themselves with a room. I am NOT medically qualified so speak utterly from personal experience and my amateur researches. Firstly we need to establish why we experience...

fully decarb'ed 6g will have most folks dialing 911 convinced they have consumed a 'fatal dose' lol! Let us know how messy that got you, if nothing else we could use a good laugh!

Seriously, if i hold a handful of my soil in my hand and it don't move on its own I start worrying, but that's just me! Looks like a dusting of diatomatious earth will keep the root eating buggers at bay, tho it might be worth trying to hunt out a few centipedes, busy little carnivores that they...

3500k full white all the way home!

@Jack Vault hey fella, hook up with me sometime, I do web radio and would love to shoot the breeze with ya bout UK 420 and general legal fuckaries of living in a prohibition dictatorship that does nothing but promote the gangsters and prevent the herb from working its real magic. Same offer goes...

Lookin good there derpsta, healthy, great internodals, sorry to have been the harbinger of doom fer yer reveg, was kinda hopin you would be able to tell me wot i'd done wrong in the past. Keep postin all yer weed porn shots, can't wait to see the end results, your rig looks real tight.

Appreciate the offer INO, ta m8. Sadly I,m not able to run auto's in my setup easily. Might have words with me lad, see if he thinks we can make room someplace. If you ever want a tester for non-auto's please let me know, happy to support any uk based bro's grows. I lost my holy grail original...

nah, yer all good there. Just try to align the leds with the gaps best you can.

those babies look awesome now, crackin job! Go go derpsta!

http://www.bridgelux.com/sites/default/files/resource_media/DS33%20Vero%2029%20Array%20Data%20Sheet%20Rev%20L%2020160606.pdf not sure if thats a gen 6 or 7 spec sheet. https://www.digikey.co.uk/products/en/optoelectronics/led-lighting-cobs-engines-modules/111 drill down the filters to find your...

And if you bolt em to big enuff sinks and a full size fan they can do this........ :bigjoint:

I really like the less well known philips luxeon's I run a stack of 1211's and they simply grow great weed. A little more expensive than the competition but well worth a look see.

Sorry, my point was it should affect other 'heater' type light sources but leds should be more or less unaffected, tho as pointed out by someone here, temp of the phosphor might have some slight impact but I'd guess its nominal between say 50% drive current and 100% tho that is me guessing.

All good, only ones to avoid are ericacious (for alkali loving plants) and sphagnum moss peat, coz it destroys irreplaceable moss bogs

My 5 cents worth, we are talking about a quantum event at the P/N boundary that can only occur once the diode threshold resistance is breached @ min drive voltage, after this point the amount of light output is down to the amount of electrons crossing the pn junction which equates to drive...