Ideal for garage, workshop and basement lighting, the Philips 40-Watt 16 in. Cool White Circline Fluorescent Light Bulb (FC16T9/COOL WHITEPLUS) delivers 2,500 Lumens of light and lasts up to 4-years or 12,000 life-hours. It mounts to fixtures that accept 4-pin bulbs. Multiple application uses for superior light output.