Advantage: FC8T9/841 22W cool white round fluorescent bulbs 6400k, 1350 lumens, Energy saving bulb. 8inch Circular Light Bulbs: 8 inch t9 type 22 watts circline light bulb, 4 pin G10q base, CRI80, soft cool white 6400k. FC8T9/CW Cool White plus 22 watt circline Fluorescent lamp: 16,000 hours lifespan working with matching and reliable electronic or magnetic ballast. Application: replacement for fc8t9/cw 22 watt 8 inch round t9 fluorescent circular light bulb in ring ceiling fixtures bedroom, bathroom, kitchen, hallway, laundry room, office. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Photo Color Material:Glass Package Contents: 2 x Circular Fluorescent Light Bulb Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.