Lamps are bright and great color. It turned out that the lamps burned out early. As a result, I tracked each lamp's burnout rates over the past seven months. The failure rate for the 12 lamps used was between 84 and 1003 operating hours. The mean time between failures (MTBF) was 603 hours (an). I plan to look for a lamp with a higher MTBF. For clarification, only the operating time (switching on) of the lamps was included in the calculation.
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