Older linear fluorescent fixtures used throughout most of the older buildings on the Western Michigan University campus utilized T12 type magnetic ballasts ... concentration and the overall health of ...

2 LAMP, 120-277 VOLT, T8, T10, T12 FLUORESCENT EMERGENCY BALLAST 0 TO 39 WATT, 600 TO 700 LUMENS, 90 MIN RUN TIME, 2 INCH LONG X 9-16/41 INCH WIDE X 1-1/2 INCH HIGH. FREE 2 YEAR RADWELL WARRANTY [See ...

His old setup uses fluorescent light fixtures with T12 bulbs ... found that T5 is not much more efficient than T8, but they use an electronic ballast to boost efficiency.

2 LAMP, 120-277 VOLT, T8, T10, T12 FLUORESCENT EMERGENCY BALLAST 0 TO 39 WATT, 600 TO 700 LUMENS, 90 MIN RUN TIME, 2 INCH LONG X 9-16/41 INCH WIDE X 1-1/2 INCH HIGH. FREE 2 YEAR RADWELL WARRANTY [See ...