500 lux

Lux and footcandles are so not useful to photographers. indeks sp 500 What photographers want to know is the aperture and shutter speed to use at a given ISO for a light The key to this is simple: 1000 lux or 100 fc give an exposure of f/2 8 at 1/50 for ISO 100 That info is all that you need to figure out any exposure for any amount of lux or fc