Osram T8 L 18W/840 Lumilux Cool White G13 - Features Osram LUMILUX T8 fluorescent lamp is equipped with a G13 socket, and it's available in different wattages and different colour temperatures. The wattage of a fluorescent tube is directly proportional to its size, so be careful when choosing a new product, so it's compatible with your old fixture. Thanks to its G13 socket, this fluorescent lamp is very easy to install into a fixture. Thanks to the colour temperature of 4000K, this lamp is suitable for many application areas such as: Areas of application Public buildings Office lighting Industry Shops Supermarkets and department stores Street lighting Outdoor applications only in suitable luminaires However, the lamp's light is not distressingly bright. Objects illuminated with a colour rendering of 80-89Ra are displayed naturally, when the colors are separated well. The average lifetime of these lamps is very long, around 20000 hours. This lamp is also very energy efficient, and it's classified in energy efficiency class A.