Out here on the West coast, we don't get the fireflies that they do on a summer evening in the East coast. So an entrepreneurial engineer figured out how to make electronic ones:
Up close, they look very high-tech:
He is selling them in small batches for $10 each, and offers a "buy-by-the-month" plan to allow you to reach the optimum number for your yard. Plus he is donating a portion of each purchase to charity.
All around very cool.