Sylvania 23519 FC8T9 22w 8in. T9 Circline 4100K Cool White 1050Lm G10q 4Pin Fluorescent BulbFeatures:- SYLVANIA FC8T9 Fluorescent Pre-Heat or Rapid Start T9 Fluorescent Light Bulb - Specifically designed to be operated in a fixture requiring a 8"� circular lamp with 4-Pin (G10q) base on either rapid start or pre-heat ballast- Color: 4100K Cool White - perfect to be used in many applications such as kitchen and bathroom or hospitality businesses that have ceiling fixtures or fluorescent torchiere fixtures- Shape: Circline FC8T9 - 8 inch Circle Diameter with T9 tube (1.125inch tube diameter)- Wattage: 22W- Light Output: 1050 lumens- Color Temperature: 4100K Cool White- Rated Life: 12,000 hours - 80 CRI - ensures premium color definition. - Base: G10q 4Pin- This light bulb is designed to be used indoors.