| This 28W F32T8 really is just as bright as the full 32W T8 bulb. To test this, we installed the FO28/841/XP/SS/ECO Sylvania bulbs and the FO32/741/ECO, also by Sylvania, in identical fixtures. The fixtures were the P232E81-TS-8 by Lamar Lighting, which include a power cord. We plugged the two fixtures in to one Kill-a-Watt each on the same power strip, and turned them on. To be fair, we did wait 100 hours before taking a sampling of wattage and lumens, but we found that the 32W configuration used 59W total for the two lamps, while the 28 watt setup used only 52W. The light produced by the 28W setup appeared brighter to my eye, but my trusty Ideal Stick Digital Light Meter actually confirmed that the measurable light was really identical, measuring 55 footcandles at three feet from the center of the fixture in an otherwise unlit room. |