This 4-pack of T5 21-inch LED F13T5DL LED Replacement Bulbs is the perfect energy-saving solution for under-cabinet lights. With 9 watts of power and 920 lumens of daylight white 6500K light, these bulbs are a direct replacement for 21-inch T5 9W tubes and can save you over 50% in energy costs. Compatible with most ballasts, these bulbs are easy to install and have an average life of 25,000 hours. Unlike fluorescent and CFL bulbs, these LED lights do not contain mercury and won't release any hazardous gases. Enjoy ultra-bright, cool white light with a CRI of 90. Get the perfect lighting solution for your home with this 4-pack of F13T5/DL Cool White LED 920 Lumens bulbs.