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. (
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Discover the 55 Different Types of Light Bulbs to Light Up Your World
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GE CYNC Smart LED Light Bulbs, Soft White, Bluetooth and Wi-Fi Enabled, A19 Bulbs, 2pk - Walmart.com