But the black-blade solution may only work in certain circumstances....Many birds, for example, collide with wind turbines at night, when tower colors are irrel

But the black-blade solution may only work in certain circumstances....Many birds, for example, collide with wind turbines at night, when tower colors are irrelevant." Ok. What about spinning or lighted designs in a rotating fan display? I cannot for the life of me figure out what it's called, but when the fan blade spins it makes a pretty design that is visible to birds, but also perhaps pleasing to people.