I am curious as to why the Lumia 5.2 plant version would 2x less lumens per watt if in the 70-100 range (which I can't find documentation on) where as the CXA3590's are only at 134 lumen per watt max http://www.cree.com/News-and-Events/Cree-News/Press-Releases/2013/October/CXA3590-and-3070-intro...