What gets me is it makes such nonsense of the standard advice that chickens like to make nests in dark secluded boxes, but this advice gets trotted out by just about everyone on the site.
Even without the above demonstration, just the posts on this thread about chickens nesting in strange places should show that the dark box stuff is nonsense.
When you add to this the studies reagarding the hatching of eggs and how daylight is important to the correct developement of an egg, and take into account that feral chickens and the chickens ancestors have made nests on the ground for centuries, how does this box nonsense keep going? Chickens lay eggs in boxes because often it is the only option, not because they like them or they are beneficial to the chicken.
Can you link me to any studies youve bookmarked about sunlight being important to hatching eggs? I wonder if full spectrum lighting would boost my incubation hatch rates