I cannot praise this wonderful product enough. These lights are too bright to look directly into. They light up my workshop on a 3 x 3 foot grid. 12 of them emit 6600 lumens. In my case, that's an additional 33 lumens/sf. I installed them myself - everything from the instructions to the hole template was perfect. The instructions suggest cutting a hole, connecting the power, and then plugging in the included junction box, but I could connect the wires before the drywall, so I connected the junction boxes before I cut the holes. The spring attachment system works great and as you can see these lights are very thin. One of my lights overlapped about 1/2 inch of the ceiling joist - no problem with this system. Ultimately, the packaging and quality control were right. I expected that out of 12 fixtures, one could be dead instantly. , but all 12 lit up the first time. They also turn on instantly and are completely silent. I hope I don't look like a paid endorser (I'm not) or a bot, but actually I can't tell. I don't think Home Depot or Lowes have anything like this - I'm so glad I found it!