Candle meter second
From The Glossary of Digital Photography
Also known as lux-second. A unit of measure for the amount of illumination during an exposure, equivalent to one candle-meter per second, . See also candle-meter; candela (cd); lux

ONLINE GLOSSARY OF DIGITAL PHOTOGRAPY
Also known as lux-second. A unit of measure for the amount of illumination during an exposure, equivalent to one candle-meter per second, . See also candle-meter; candela (cd); lux