Sunlite PL13/E/SP41K/10PK 4-Pin Fluorescent 13W 4100K Cool White U Shaped PL CFL Twin Tube Plugin Light Bulbs with 2GX7 Base (10 Pack)Produces A Comfortable 4100K Cool White Light While Efficiently Only Utilizing A Meager 13 Watts Of Energy Emanates A Vivid 720 Lumens Of Bright Light While Lasting Up To An Impressive 10000 Hours On Average Features A Compact 6. 346" Tall 1. 428" Wide Chassis And Equipped With A Pl 4 Pin 2Gx7 Base Ideal For Table Lamps, Recessed Downlights, Outdoor Fixtures, Wall Sconces, Ceiling Fixtures, Ceiling Fans And Much More From Hotels, Medical Settings,