Black Bucket
Finding a black bucket that actually blocks the light was difficult. Almost all of the “black” buckets available are a translucent gray embedded with filaments of a black substance. These black bits reflect the light to make the bucket appear to be solid black. They do not block the light very well. A flashlight set inside a covered bucket in a dark room glows and you can see the filaments inside. I did find some that block about 99% of the light but you can still see the LED square when I but a 10,000 lumen light next to the wall of the bucket.
