Xenon Vs Bi-Xenon Vs Hi-Low Beam - What's The Difference? - XenonPro.com
LUMENS High Performance Lighting Xenon HID OE Factory Replacement Parts Ballasts, Bulbs, Connectors
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. (