If you put them on during daytime you can see indirect sunlight and even my kitchen light. They were shipped from China despite having "Made in the USA" markings and all the proper ISO certification fine print.
I haven't received any communication from Amazon, so people who haven't heard from them should not assume their glasses are safe (contrary to Amazon's statement). I contacted Amazon support and they were quick to initiate a refund. For some reason Amazon rejected my review warning that items from third party sellers may be counterfeit and explaining how to tell.
Here are a couple photos of the counterfeits: https://goo.gl/photos/1XRKw8KBgo3hjHx6A