Compact Fluorescent Plug In 4 Pin Quad, 18 watt, 5000K, CRI 82. Base - G24q-2, Length - 5.8", Initial Lumens: 1150, Average Lumens: 980. Average Life: 10,000 hours. Must use electronic ballasts. Must use electronic ballasts. We also have electronic ballasts, recessed lighting, including dimmable fixtures. see http://www.dmflighting.com. Call or email for pricing of fixtures.