The Crompton Lamps CLC28CW4PIN Compact Fluorescent CC 28w Cool White 4 Pin GR10q is an indoor lamp bulb made of glass, with a bulb wattage of 28w and an output voltage of 240V. This compact fluorescent lamp (CFL) from the reputable brand Crompton features CE marking certification, making it a reliable and energy-efficient lighting option for your home or space. The 4-pin connector ensures compatibility with suitable fixtures, while the cool white light provides a bright and clear illumination.