How to Convert Lux to Lumens With a Light Box
- 1). Convert lux to lumen/feet by multiplying the lux by .0929. As an example, a reading of 20 lux converts to 1.858 lumen/feet.
- 2). Covert 1 lumen/foot back into lux by dividing it by .0929. For example, a reading of 20 lumen/feet converts to 215.29 lux.
- 3). Convert lux to lumen/centimeters by dividing by 10,000. Thus, 500 lux equals .05 lumen/centimeters.
- 4). Convert lumen/centimeters back into lux by multiplying the lumen/centimeters by 10,000. A reading of .35 lumen/centimeters equals 3,500 lux.
Source...