The F18T4/CW Light Bulb is a high-quality fluorescent tube with a T4 bulb shape and Bi-Pin connectors. With a color temperature of 4200K and a brightness of 1000-1999 lm, this light bulb provides bright and efficient lighting. The item length of 19.3 inches makes it suitable for various lighting applications, and its 18W bulb wattage ensures consistent and reliable performance. This single bulb is a great choice for those looking for a dependable and energy-efficient lighting solution.