Your comment begs a question I've been thinking about for awhile, so I thought I'd throw it out there.With only 5' of height I don't think I'd recommend it. The 5w diodes inside reflectors requires some distance from the canopy.
I've been enraptured by all the shiny objects that are hot topics in sundry discussions of late: DIY and Commercial COB lamps. Having been growing with a junky LED circa 2009-2010 in a ... shudder... cabinet (46 x 30 x 7, I have no hope of devoting an entire room to growing, with lights hanging from the ceiling in more of a greenhouse set up.
So, where are these cutting edge lights applicable? Rooms only? 6, 7, 8, or 9 ft height? Gorilla Grow with extensions but no Secret Jardin at 5 ft?
Which bulbs should we look for when trying to minimize unnecessary heat while growing in non-industrial spaces while growing various strains (Tall Sativa to shorter Indica) in various styles (LST & SCROG to untrimmed 1970's style bushes--- ok, trees. But bushes matches the 1970s porn metaphor better)?
If I were going to build or buy a light for a 3x3 or 4x4 tent, how do I determine overkill based on vertical space?
All you rock stars here are like sirens calling. What are the varying scenarios where you would apply different lighting schemes?