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It varies based on the ballast. Most ballasts nowadays are "power factor corrected" to try and compensate for the bad powerfactor in switching power supplies. The actual power factor of a individual fixture is entirely dependent on the circuit of the ballast, which changes from design to design.

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โˆ™ 2015-07-15 20:59:24
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Q: At what power factor do commercial 4 tube fluorescent fittings usually operate or can they vary?
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