Covers ballasts of the resistance, reactance, and electronic (high frequency) types for use with fluorescent lamps involving a potential of 2500 volts or less in accordance with the National Electrical Code, ANSI/NFPA 70. Fluorescent-lamp ballast may be determined by investigation to be acceptable for use, in a fixture or other device, with electric-discharge lamps of other than the fluorescent type. Fluorescent self ballasted lamps and ballast adaptors are evaluated using the standard for Self-Ballasted Lamps and Lamp Adapters, UL 1993. The component ballast is evaluated to requirements in this Standard. This standard was listed for public review in the 8/25/2000 issue of Standards Action. It is being resubmitted due to substantive changes to the text. [see email for 30-day PR text]