Beyond LED Technology LED Linkable Integrated Tube Light 8Ft 60-Watt EQ Bright White Single Pin (T8) LED Light Bulb (4-Pack) in the Tube Light Bulbs department at Lowes.com
Bulb Reference Chart | Bulb Base Types | LED Guide
Light-bulb standards mean you'll need new fluorescent fixtures, will pay more for halogen spotlights - cleveland.com
Light Bulb Types: The Homeowners Guide to by DOC Electric