sentences:  The wingtip navigation lights are required to consist of a red light on the left wingtip and a green light on the right wingtip.Landing lights are used during the descent and approach to landing, and at other times if deemed necessary by the flight crew or operator.These lights can generally be found attached to any tall structure such as broadcast masts and towers, water tanks located on high elevation, electricity pylons, chimneys, tall buildings, cranes and wind turbines.