Tender For supply of lux meter with extra battery, details specification : i) range : 20 to 20000 foot candle ii) sampling rate : 2.5 times per second iii) display : 1/2 digit 1999-point lcd screen iv) weight : must be less than 250 gm v) precison : +/- 3 % (at 2854 k calibrated by the common incandescent lamp) accepted make-ut383 , motwani , meco , toshniwal , hitachi , hpl , havells [ warranty period: 30 months after the date of delivery ]