Warehouses, both refrigerated and nonrefrigerated present opportunities to save energy in a range of areas, including lighting, HVAC, and materials-handling equipment.

Metal halide, compact fluorescent, light-emitting diode, and advanced halogen reflector lamps can be used to provide more efficient track lighting than is possible with conventional track lighting.

Metal halide and high-pressure sodium lamps have dominated the market for lighting indoor spaces with high ceilings. But high-intensity fluorescent light sources have improved significantly, making them the most cost-effective solution for most high-bay applications.