I saw this via video lately: a beek, figuring bees being moved from a swarm trap to a deep would prefer dark as opposed to having ambient light from the deep's screened bottomboard, used newspaper to cover the screen. Said the bees'll eat away the paper and'll appreciate having the more-natural darkness for a time (at least).
I'm moving toward solid BBs myself, so this idea appeals to me. As some folks in the Forum have said, maybe a screened BB is good re: ventilation in summer, but otherwise, the nice darkness seems to me more desirable.
Anybody have experience on/thoughts about this? All opinions welcomed .... thx.