Project Description

For years, the standard method of lighting gymnasiums has been the 400W Metal Halide High Bay. This has led to gyms with deteriorating light levels and poor playing conditions that are expensive to operate. New technologies have allowed lighting designers to specify T5 High Output (T5HO) Fluorescent High Bay Fixtures in place of the more inefficient metal halide fixtures. This shift has reduced the power consumption of gymnasium lighting systems, provided better quality light for all sports activities, and has allowed for a more versatile environment in school or recreational center gyms.

This post provides guidance on how to retrofit a gymnasium with more energy efficient lighting. We will use a typical high school gym as a base for our energy savings and provide example lighting layouts with point-by-point light levels.

Energy Efficiency

Traditional 400 W Metal Halide high bays consume a total of 454 Watts of power – 400 Watts for the lamp and an additional 54 watts of ballast power. By comparison, a 4-lamp T5HO fixture consumes only 228 Watts of power while a 6-lamp T5HO fixture consumes 342 Watts. This lower energy consumption allows for a reduction in total lighting system consumption and therefore a lower electric bill.