GE, F54T5/841/16PK, 54W, Fluorescent Light Bulb, High Output, 45.2" Nominal Length, Miniature Bi-Pin G5 Base, 4,100 Kelvin Color Temperature, 5000 Initial Lumens, 36,000 Hours, CRI= 85, TCLP Compliant, Retrofit Recommended, Compatible With GE Ballast #29726.