Fluorescent Lamp, Linear, F21T5/35K/8/PS/G5/STD, 21 W, Fluorescent Lamp, Miniature Bi-Pin G5 Lamp Base, T5, 2100 lm Initial, 1995 lm Mean, 30000 hr Average Life, 85 CRI, 3500 K Color, Program Start, White/Tri-Phosphor Coated, 5/8 in Dia x 34 in L, 100 lm/W Efficacy, 60 Hz, -10 deg C Minimum Starting, Standards/Approvals: TCLP Compliant