I want to know what is the light lux for external staircase?

Question

ANy BS standards to back up

Answer 1

a general lux of 50 lux is enough so people can see thier way, but if you want more detailed study please visit:

www.licht.com

its lighting designing website and you'll be amazed by how much information you can get - it is a German website but there is an English button.

and for the download able guides don't care about the price because you can download them for free with no charge
the prices are for the original guides i think

if you are interested in lighting design i advice to visit:

www.dialux.com

you'll find a free program for lighting design - interior and exterior - which is helpful and very easy and there are a lot of features in it.