It seems like folks got issues, if u ain't got try ...if not ... talk is cheap... results....I worked for the US Air Force optical devision, weapons labs Albuquerque NM...talk...
cw
Not criticizing you or your skills. Just looking at specs and comparing lighting performance. Your light works for you and that is great. I just like to figure what the real deal is on lighting specs. My pet peeve with all the cannabis markets like lighting, nutrients, hydro systems etc. is all the marketing hype. More than any other consumer market has the most BS associated with the products. It creates a lot of confusion for us gardeners and especially F's over the beginner who ends up spending his or her hard earned money on crap.
I was and am a professional in the industry but not selling anything to anyone. However, not interested in a dick wagging contest about my credentials and the discussion I offer up isn't meant to offend. Been asked to build lights for several people that dont like DIY projects but have never done so. The products I like the most for canna culture are companies I have no financial or other interests in.
For example if you were in optics you can do the trigonometry and easily figure out the light spread of your light. Half of 90 degrees is 45 degrees, the tangent of 45 is 1. That means at their 12" off the canopy height (they use 12" for their spec) then the spread off the axis is exactly 12". 12" + 7" +12" =31". Therefore, the light spread across the width of the lamp is about 31" not 48. It might grow plants in a 4x4 but the coverage is less than 31" cause the optics they are using are less bright along the edges based on the lambertIan radiation pattern of LEDS and the laws of Etendue that govern the effectiveness of reflectors not to mention the TIR losses if they really are using TIR.
Sorry if I offended in any way,
Dee