Estimates assume listed wattage equals draw. HMI and magnetic-ballast fixtures can pull 20–40% more than lamp wattage — when in doubt, call us. A single fixture can't be split across circuits, so fixtures are packed into 20A circuits one at a time (about one 2K / 2000W per 20A circuit at 120V). Any fixture that draws more than a 20A circuit can hold is flagged for its own dedicated higher-amperage circuit — a 5K, for instance, runs on a 60A Bates. For planning only; not a substitute for a licensed electrician. Always follow the NEC and local code.