The OttLite Bulb Replacement Type B PL18-B Model T18330 is an energy-efficient clear white compact fluorescent lamp designed for indoor use. This bulb has a 4 pin connector and a bulb wattage of 18W, providing a bright and long-lasting light source with a lifespan of 10,000-14,999 hours. Made of glass and featuring energy-saving technology, this bulb replacement from OttLite is a reliable choice for illuminating your home with a high-quality light output.