Abstract
ABSTRACT This article provides information on three groups of lighting strategies for typical office, school, hospital, and similar linear fluorescent applications: optimal retrofit, relight (replacing fixtures one for one, like replacing a direct troffer with an indirect basket troffer), and redesign (complete new layout, like with suspended indirects). Since high-lumen extended-life 32W F32T8s and optimal electronic ballasts can often cost effectively replace basic grade T8 and generic electronic ballast systems, eliminating T12s and magnetic ballasts is a slam-dunk. The limitations of 28–30W F32T8s will be included. As Willard Warren states, “Retrofitting a lousy lighting system into an energy efficient lousy lighting system is a wasted opportunity.” Quality lighting is much more than proper horizontal foot-candles. Light levels can often be significantly reduced in older office buildings that were originally designed for paper tasks, where computer work is now the main task. Suspended indirect fixtures usually provide much better lighting quality and can reduce wattage compared to direct troffers. The benefits of scotopically enhanced lighting will also be discussed.
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