Hmm, I'm not sure the lights can be converted into real world values, however when looking on google I found this site which might be of interest, www.panoptic.co.uk/light_meas.htm one of the quotes from the site says; -------------------------------- LUMINOUS FLUX This is defined as the total amount of light energy radiated by a source into the space surrounding it and is measured in Lumens. A Lumen is defined as the luminous flux emitted in a solid angle of 1 Steradian by a point source having a uniform intensity of 1 Candela. Examples The luminous flux from a typical 100W incandescent light bulb is 1740 lumens A candle has a luminous flux of 12 lumens The measurement of Luminous flux in Lumens is the best comparison between different light sources eg comparing PANOPTIC MATRIXLITE LED lighting systems to fluorescent light strips. ----------------------------------- There are loads more sites that have better (or worse) explainations so why not spend a while surfin' :) Hope some of that helps