Sister Cane,
I luv your idea! Having solar lights on a timer is kinda bad as it doesn't provide a fading dusk that allows the chooks to find their place on the roost before it gets dark. With a timer, it's just SURPRISE! Lights out and you can crawl your way to a safe place.
Using the solar Christmas lights is a great idea as the trickle down lighting at the end of the charge provides then girls plenty of time to get to their roosts and sort out any grievous violations to the pecking order that may have occurred while preparing for nighty-night. Simple yet effective, gotta luv it!
Thanx! I may well use your idea in my coop.