(1) Every farm tractor and every self-propelled farm equipment unit or implement of husbandry not equipped with an electric lighting system shall at all times specified in section 49-903, Idaho Code, be equipped with at least one (1) lamp displaying a white light visible from a distance of not less than five hundred (500) feet to the front of the vehicle and shall also be equipped with at least one (1) lamp displaying a red light visible from at least the same distance to the rear of the vehicle, and two (2) red reflectors visible from a distance of one hundred (100) to six hundred (600) feet to the rear when illuminated by the upper beams of head lamps. Lights required in this section shall be positioned so that one (1) lamp showing to the front and one (1) lamp or reflector showing to the rear will indicate the further projection of the tractor, unit or implement on the side of the road used in passing the vehicle.
(2)  Every combination of farm tractor and towed unit of farm equipment or implement of husbandry not equipped with an electric lighting system shall at all times specified in section 49-903, Idaho Code, be equipped with the following:
(a)  At least one (1) lamp mounted to indicate as nearly as practicable the extreme left projection of the combination and displaying a white light visible from a distance of not less than five hundred (500) feet to the front of the combination;
(b)  Two (2) red reflectors visible from a distance of one hundred (100) to six hundred (600) feet to the rear of the combination when illuminated by the upper beams of head lamps. The reflectors shall be mounted in a manner to indicate as nearly as practicable the extreme left and right rear projections of the towed unit or implement on the highway.
(3)  Every farm tractor and every self-propelled unit of farm equipment or implement of husbandry equipped with an electric lighting system shall at all times specified in section 49-903, Idaho Code, be equipped with two (2) single-beam or multiple-beam head lamps meeting the requirements of sections 49-922 or 49-924, Idaho Code, respectively or, as an alternative, section 49-926, Idaho Code, and two (2) red lamps visible from a distance of not less than five hundred (500) feet to the rear, or in the alternative, one (1) red lamp visible from a distance of not less than five hundred (500) feet to the rear and two (2) red reflectors visible from a distance of one hundred (100) to six hundred (600) feet to the rear when illuminated by the upper beams of head lamps. Red lamps or reflectors shall be mounted in the rear of the farm tractor or self-propelled implement of husbandry to indicate as nearly as practicable the extreme left and right projections of the vehicle on the highway.
(4)  The farm tractor element of every combination of farm tractor and towed farm equipment or towed implement of husbandry equipped with an electric lighting system shall at all times specified in section 49-903, Idaho Code, be equipped with two (2) single-beam or multiple-beam head lamps meeting the requirements of sections 49-922, 49-924, or 49-926, Idaho Code.