Westinghouse T8 G13 (Medium Bi-Pin) Light Bulb Cool White 1 pk (Pack of 10)Westinghouse T8 (9 Watt) Cool White (4000K) G13 (Medium BiPin) Base LED Linear Light Bulb provides brightness and color quality comparable to fluorescent bulbs, this ballast bypass LED turns on instantly without flickering, and lasts up to 2. 5 times longer. It reduces maintenance costs and provides up to 56% energy savings over linear fluorescents. It's specifically designed to eliminate shadows and dark spots in light fixtures, while focusing light