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    Against 4000k (for humans!)

    http://www.npr.org/sections/thetwo-way/2016/06/21/482936520/bright-bluish-white-led-streetlamps-bad-for-our-health-ama-says
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    Cannabis Pharma Ebbu Announces Progress

    http://www.businesswire.com/news/home/20160613006490/en/Ebbu-Announces-Groundbreaking-Production-Scale-Purification-Process A single step separation of 18 cannabinoids! ( Brian Reid, chief scientist at Ebbu has Ph.D. from University of Oregon) http://www.ebbu.com/
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    German Nachroma VEG HPS?

    Anyone use these? http://narva-gle.com/nachroma-en.html#nachroma-veg-en http://narva-gle.com/files/download/product-pdfs/NCT-N-VEG-1000-12.pdf a lot of blue for HPS!
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    PWM dimming does nothing for LED efficiency (lm/W)

    (I think) So a lot of people here speak of dimming their COBs to get more efficiency (lumen/watt or lm/W) and while it is true that lowering the Vf (or current) of an LED will increase its efficiency like this: the typical dimming circuit incorporated in many power supplies is a pulse width...
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