Usage Tips:Advantage: FC8T9/841 22W cool white round fluorescent bulbs 6500K, 1350 lumens, Energy saving bulb.8inch Circular Light Bulbs: 8 inch t9 type 22 circline light bulb, 4 pin G10q base, CRI80, soft cool white 6500K.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 ColorMaterial:GlassPackage Contents:2 x Circular Fluorescent Light BulbOnly 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.