Hello, I want to know how many fluorescent light fixtures can I run on a 20amp breaker? Ballest amps or watts of bulb? Thank you.

A 20 amp 120 volt circuit can handle a maximum of 1920 watts, or 16 amps.

Each ballast will have the amp draw for the ballast and lamps combined, use that value.


Do not simply add up the watage of each lamp.