The Osram 11W 2 pin 840 Dulux-S G23 Coolwhite lamp bulb is an energy-saving compact fluorescent lamp with a cool white light colour and a colour temperature of 4000k. It has a wide beam angle of 180° or more and is designed for indoor use. The bulb is made of glass, has a frosted finish, and a bulb wattage of 11W. With a low energy efficiency rating of A and a long bulb life hours of 10,000-14,999 hrs, this Italian-made lamp bulb is a reliable and efficient lighting solution for home use.