Bright rectangular light on the ground

Was driving west on county road 111 surrounded by corn and bean fields. About half a mile away as we were approaching we noticed a very bright light on the ground in the field. Initial thought it was a fire in the distance, had an orange hue with an aura around it. It was almost a rectangular shape making us think it was a combine. As we approached it , it suddenly disappeared as if shutting down a combine or turning off head lights. The light lasted for about 10 seconds. When we passed the location there was no combine or farm machinery and no other vehicles or house. It was an empty bean field.