Typical Office according to CIE Standard requires 500 lux.
CIE Standard for Lighting Offices
But numbers sometime come to clients as vague information that is why even simple rooms had to be rendered in 3D images for layman clients to be able to visually grasp the meaning of 500 lux even before they buy your proposals. That is where we, lighting designers, come into the picture.
I am pleased to inform you that IESNA have released their latest ANSI/IES RP-8-14 Roadway Lighting. I am listed as one of the Advisory Member where I was able to share lighting design techniques and some best practices that we do here in the region for Roadway Lighting application. We have been exchanging ideas on several points for over two years and casting votes regarding topics with disputes and this is now our fruit of labor.