Wattage: 40W Color Temp: 3500K Length: 22.667 Lumens: 3,150 Base Type: 2G11 Life Hours: 20,000 40W CFL - 2G11 Base 3500K Lamp - Osram Sylvania Dulux L 20585/520537. This is a compact fluorescent lamp with a 2G11 base. The Dulux L code is 40W/3500K/RS. These lamps have twin tubes and are 22.5 inches long