US Energy Sciences SKSH Series High Profile Reflector Kits are designed to convert standard T12 strip fixtures to more efficient T5fixtures. SKSH version is specially designed for luminaires with a ceiling height of 12 to 20 feet and provides over 96 percent efficiency. Kit includes all lampholders, screws and lamp holder plates. Enhanced Aluminum for 95 Percent Reflectance. For Luminaire heights of 12 to 20 Feet.