The Night Rover Challenge is to demonstrate a solar-powered exploration vehicle that can operate in darkness using its own stored energy. The prize purse is $1.5 million. The objective is to stimulate innovations in energy storage technologies of value in extreme space environments, such as the surface of the moon, or for electric vehicles and renewable energy systems on Earth.
I have been wondering whether a night was Earth type darkness of order(12 hours) or a Moon type darkness of order(2 weeks).