Bulb Specifications: This pack of 6 bulbs F13T5 Fluorescent tubes are 21” long and use 13 watts with 1000 Lumens Easy Installation: These linear bulbs come with 2 pins at each end for simple installation; just pop it into the socket and twist it into place Color Temperature: Features a 3000K warm white light color that creates a crystal clear, cool white glow and an eye-friendly ambiance for your kitchen or office Long Lasting: Designed for a lifespan of 12,000 hours, reducing the frequency of bulb changes Wide Application: Suitable for use in office and residential buildings, supermarkets, malls, hotels, restaurants, schools, hospitals, parking lots, and garages