Improved Halogen Systems
Many incandescent lamps can be replaced with halogen lamps for a gain in efficiency and service life.Many standard halogens (aside from some specialty applications) can be replaced with high performance "Infrared" (IR) halogen lamps. These lamps work by increasing the operating temperature of the halogen lamp, increasing efficiency.
Though more efficient than other incandescent and halogen lamps, these lamps are still inferior in efficiency to fluorescent and HID lighting systems.