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lux hokiLhtLux Hi-Tester. The 3423 is an easy-to-operate hand-held unit that can measure a broad range of luminosities, from the low lht provided by induction lhting up to a maximum intensity of 199,900 lx. This device is suited for aSimulation measurement shows an average lhting value of 461.3 lux from 07.00 to 17.00. The result does not meet the SNI 16-7062-2004 for fine work, which is a minimum of 1000-2000