Westinghouse T8 Linear Fluorescent light bulbs operate on T8 programmed rapid start or instant start systems. For best results use these light bulbs in conjunction with a properly rated ballast. To help you find the right bulb for the right application, see Westinghouse's full offering of T8 Linear Fluorescent light bulbs, available in a variety of color temperatures, sizes, and wattages. Use in new or existing T8 fixtures. These light bulbs contain mercury. Dispose of according to local, state or federal laws. For more on clean up and safe disposal, visit epa.gov/CFL. Product reference number 37334.