Light Bulb Identifier and Finder Guide - Ideas & Advice | Lamps Plus
Types of Light Bulbs - The Home Depot
Powers Electrical Solutions, Inc - Do light bulb types confuse you? You're not alone! Check this out...BT (Blown or Bulbous Tube) Type HID Bulbs (Code: ET) BT means Blown or Bulbous Tube. (
Light Bulb Size Chart | Maxim Lighting
Different Light Bulb Sizes, Shapes and Codes | Light Bulb Size Chart - ElectronicsHub