Sunlite SL20/BLB/8PK 20W Spiral Energy Saving CFL Light Bulb Medium Base (8 Pack), Blacklight Blue 20 Watt Compact Fluorescent Bulb, 120-Volt. Color Accuracy (CRI): 80 75-Watt A19 Incandescent Bulb Equivalent 8,000 Hour Average Equivalent Lamp Life Blacklight Blue, E26 Medium Base Ideal for Backlight party's Halloween and Similar applications