No, I don't think they work well. I haven't seen a single UFO on the market that contains all of the nm at the proper wavelengths for marijuana. Nor have I seen any that incorporate a 60 degree LED, which is needed for penetration. LED's grow lights are fairly complex in what is truly needed to produce good results with plants. That is why most companies haven't figured out the design changes necessary, and all of the proper ratios of colors, to create a light capable of full flowering.
My friend got special pricing on her units, which I won't divulge. She was one of the first people to believe in me and my light, and allow me to document her progress. The retail on 5, 126W lights is $2000.