The Standard for Luminaires, UL 1598, covers safety requirements for luminaries, however, low-voltage lighting systems are covered by specific safety standards for the low-voltage aspects of these systems. The Standard for Low Voltage Landscape Lighting Systems, UL 1838, covers the safety requirements for landscape lighting systems; the Standard for Low Voltage Lighting Systems, UL 2108, covers incandescent luminaires and luminaire fittings; and the Standard for Low Voltage Lighting Systems for Use in Recreational Vehicles, UL 234, covers luminaires for recreational vehicles. The Standard for Portable Electric Luminaires, UL 153, covers luminaires with specific requirements for low-voltage lighting systems intended for installation under a shelf, a cabinet or a similar structure. When the low-voltage lighting system is being installed in permanent cabinets with a remote power source connected to fixed wiring, these products are required to comply with UL 2108 for low-voltage incandescent luminaires and luminaire fittings.
Find more information on the IAEI website.