3
Foot-Candle meters measure light intensity as perceived by
the human eye. The eye perceives light of approximately 560
nm most strongly, with perception half that at 500 and 600
nm.
The meters display values in the range 0-1999. This must be
multiplied by 10 to obtain Foot-Candles, so the meter range is
0-19990 Foot-Candles. Since 1 Foot-Candle is equivalent to
approximately 10.8 lux, multiplying the meter reading by 108
will compute lux.
