13W Fluorescent Computer Task Lamp, 2-1/4"" Clamp-On or Desk Base, 30"" Arm Reach, Sold as 1 Each Black computer task lamp. Multi-directional shade and 25"" arm. Includes base for desk and edge clamp for tables up to 2 1/4"" thick. Energy-efficient bulb has 10,000-hour life rating. Accepts 13W compact fluorescent bulb (included).