Linear Fluorescent Lamp Lamp Shape T8 Diameter 1 In. Length 60 In. Base Type Medium Bi-Pin (G13) Start Type Instant Lamp Designation F58T8 /CT 58 Watts Lamp Tone Cool Color Temp 4100K CRI 85 Initial Lumens 4680 Mean Lumens 4450 Average Life 20 000 hr. Min Starting Temp -20 Degrees F Yes Shatter-Resistant Meets 2012 Lighting Legislation Energy Speciality