Sunlite SL20/BLB/6PK 20W Spiral Energy Saving CFL Light Bulb Medium Base (6 Pack), Blacklight Blue 20 Watt Compact Fluorescent Bulb, 120 Volt 75 Watt Incandescent Bulb Equivalent 8,000 Hour Average Equivalent Lamp Life Blacklight Blue UV, E26 Medium Base Ideal for Backlight party's Halloween and Similar applications