Amazon.co.jp: LED Base Light, Trough-Type, LED Fixture, 40 W Equivalent, 2 Light Equivalent, Direct to Ceiling Lighting, 49.2 inches (1,250 mm), Shade Type, LED Base Light, With Reflective, 40 Straight Tube Fluorescent
Types of Light Bulbs - The Home Depot
Light Bulb Shapes, Sizes and Base Types Explained | LEDwatcher
Base Types
Lamp base types - Vivid Leds, Inc.
Bulb Base Types
LED Bulb Base Types Infographic | Warehouse-Lighting.com
Understanding Light Bulb Base Types: Screw Bases | Super Bright LEDs