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I found Sanniesshop.com when I was looking for the best available Jack Herer. Sannie is not too proud to pull a product that hermies on some people (Extrema). Sannie and e$ko are real people and likely to interact with you on opengrow if necessary. Send cash in an envelope and get 20% off...

Maybe this has already been posted but here is a preliminary data sheet for Mean Well HLG-240H-C series: http://www.meanwelldirect.co.uk/public/ranges/pdfs/r1981/r1981_3.pdf (HLG-240H-C-SPEC 2014-10-17)

Sorry about the stoner thoughts earlier, Jerry is still slinging COBs from the same storefront as before. I just ordered a dozen CXB3590 5000K 36V CD. Ten bucks apiece cheaper than Mouser (including delivery) with 9% more flux @ 85C (12,000 lm). Edit: The 4.5% merchant Paypal fee is now...

Oh, I see--the same company with different divisions http://kingbriteopto.en.alibaba.com/ http://m.kingbriteled.en.alibaba.com/ <<Jerry Meng is here

[My first email was a week ago today. I'm waiting for today's mailing. (I've almost talked myself into COB 5K vegging lights because they will fit the space better than the current 4ft tubes.)] Dear Valued customer, Nice day! I am Jerry from KingBrite, it is my pleasure to support you. I am...

I think the COB companies smacked down Kingbrite, the page does indeed only show lenses now. Jerry started sending out a weekly email showing Cree inventory to customers.

I love heat sinks. BAL 1000 Series - 1343HS

Excellent use of a repurposed level!

I've got a brick of coco for emergency use but I buy bags of Canna. An 18 gallon tote holds a 50L bag and I cover it, no problems except condensation. It sounds like you're ready to go.

Does it stink? Coco itself is very inert--I stored a bag under a dripping pipe for a year (by mistake), no problem. The CalMag has a little nitrogen. Have you rinsed the coco at all? If not, I'd do that next to get rid of salt. If you have an EC/ppm meter, a slurry test is a good idea before...

Action Then, according Khyber on slashdot (where I found the press release): "I love how slashdot sucks up to Philips advertising while forgetting their very own denizens that have been doing this LONG BEFORE Philips got into the game. Let me tell you why the Philips system is a bad idea: 1...

LED Academy brought me up to speed in general concepts. http://www.ledacademy.net/wp-content/uploads/2015/03/led_academy1.pdf

I didn't want to go further off topic in your thread, Zheol. A hempy bucket uses the bottom two inches as a reservoir for passive hydration of the medium. A hole is drilled two inches from the bottom of a two gallon plastic bucket (from the paint department). Expanded clay balls (Hydroton)...

Today's news release: http://www.newscenter.philips.com/main/standard/news/press/2015/20150706-Philips-delivers-tailored-light growth-recipes-to-produce-fresh-food-locally-indoors.wpd#.VZsbyPlVhHy "The Philips GrowWise City Farming research center features four-layered mechanized planting racks...

Using Blumats in supersoil is probably the best way. I ran chem nutes in my reservoir (feeding coco) but finally gave up due to mold issues in the tank and lines. I've just transitioned to hempy buckets but almost went with soil and a plain water Blumat system.

I considered passive for some 740nm but at least for the LED Engin "4-in-1" stars it made sense to active cool. Here is my combo bar for deep and far red (that I haven't built yet, the 25W driver juices the three 740nm stars):

Assuming a 72Vf COB running a maximum of 50W, the Mean Well HLG-60H-C700 is a good match; 700mA and dimmable. Constant current region is 50 to 100V.

I see Allen Lang as supplier at Hangzhou Kulon?

I thought the OP was about this type of albino top, 24 inches from Lumigrow Pro 325: (I notice this forum ignores my MS Office photo rotation edits.)

My Lumigrows bleach and they use 450nm blue and 660nm red (and a little white for the gardener). I vote blue photons.