The document compares the energy usage of a high school gymnasium before and after replacing its lighting fixtures. The energy consumption decreased significantly, with power usage dropping over 45% and costs reduced by around 45% as well after switching from metal halide highbay lights to new T8 fluorescent highbays.

1. Before After Difference
32.1 Fc 61.2 Fc 29.1 Fc (91%)
84.5 A 46.3 A -38.2 A (-45%)
9,715 W 5,327 W -4,388 W (-45%)
High School Gymnasium
(24) 400w Metal Halide Highbay
To
(24) NEW 6T8 Fluorescent Highbay