Not all tubes are the same. Many consumers are not able to validate the performance as claimed by the manufacturers. CALiPER testing showed 50% of the tubes do not meet specifications. There are many Lighting Criteria to validate when making decision to convert from 360 deg to 180 deg beam tube. Cost is not the only factor. The quality of Light (CCT, THD, PF, Flicker, etc) and enough LUX at the task level are more critical than a cheaper tube.
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