Fluorescent lighting technology has achieved new levels of efficiency, color quality, and longevity in a class of products called high-performance T8s. Most carry a price premium, but they are typically more cost-effective replacements for T12s than standard T8s.

Metal halide and high-pressure sodium lamps have dominated the market for lighting indoor spaces with high ceilings. But high-intensity fluorescent light sources have improved significantly, making them the most cost-effective solution for most high-bay applications.