9" Circline LED Long Life Plug-in Replacement for Circular Fluorescent Light Bulb, Cool White T9 Equivalent, Suitable for Ceiling Fans Plug-in replacement for 9" circlines. Simply remove cirline and plug in CircleLED. LED Technology. Energy efficient. Suitable for ceiling fans. Long life. 50,000+ hr lifetime. 5 times longer than fluorescents. Cool White, 4100K. Warm white is also available. Instant on. No flicker. No Mercury. 3 yr Limited Warranty.