Colorado Revised Statutes Title 40. Utilities § 40-29-106. Locomotive headlights--exceptions

It is the duty of every railroad corporation, receiver, or lessee thereof operating any line of railroad in this state to equip all locomotive engines used in the transportation of trains over said railroad with headlights of not less than twelve hundred candle power, measured without the aid of a reflector; but this section and section 40-29-107 shall not apply to locomotive engines which are regularly employed in yard service, known as switch engines; engines running for a distance of not more than sixteen miles within the limits of this state to complete their runs; those used exclusively between sunrise and sunset; nor engines going to or returning from repair shops when ordered to such shops for repair.