Fluorescent Lamp, F18T8/CW/APL/24/PH/G13/STD, 18 W, 2-Pin Medium G13 Lamp Base, T8 Linear, 1225 lm, 7500 hr Average Life, 62 CRI, 4100 K Color, Preheat Start, Cool White/Tri-Phosphor Coated, 1 in Dia x 24 in L, 14 deg F Minimum Starting, 60 Hz Operating Frequency, 68 lm/W Efficacy