Ushio BC8853 CF18DE/841 18W CFL Bulb 4100K

The Ushio BC8853 CF18DE/841 is an 18-watt compact fluorescent lamp designed for use in commercial and institutional lighting fixtures equipped with a G24q-2 four-pin socket. Producing 1200 lumens of cool white light at a 4100K color temperature, it delivers efficient illumination that works well in offices, retail environments, hallways, and other spaces where neutral, even lighting is preferred. The bulb draws just 18 watts while achieving a light output comparable to much higher-wattage incandescent sources, making it a practical choice for energy-conscious applications.

With a rated average lifetime of 10,000 hours and a CRI of 82, this CFL provides reliable, reasonably color-accurate light over an extended period. It is important to note that the CF18DE/841 requires an external ballast to operate — it cannot be used in standard screw-in sockets without an adapter and ballast combination. This makes it best suited as a direct replacement in existing fluorescent fixtures that already have the appropriate ballast in place. The four-pin design ensures a stable electrical connection and supports both electronic and magnetic ballast operation.