Description Sylvania Incandescent Lamp, High Intensity, 40S11N/BL 120V Designation, 40 W, 120 V, S11 Bulb, Intermediate Screw E17 Base, Straight Sided Shape, 440 lumens, 500 hr Average Life, CRI 100, 2850 K Color Temperature, Clear Lamp, C-7A Filament, 1-3/8 in Diameter, 2.313 in Length, 1/CD