Whats your preferred practice - do you polish-up your psd's in the dark or with low-lighting, or do you work in the daylight ? I worked in a new-media studio where it was like being on a submarine with a very dark open plan suite illuminated mostly by the expensive glow of Macs and light-tables. but the photography we worked with was very properly lit studio photography of cars and food not outdoor situations and events. When I'm out, maybe in the library for example, I like to look at my pics and other peoples on the net, plus compare industry jpegs (eg reuters.com) to see how the brightness etc compares. Its amazing (and vexing) how many monitors out there in this world diplay pictures quite dark! I have been habitually working under artificial light and in the semi-dark, and I think its causing me too make things a little dark - on-screen. Maybe it's just I shot a lot of Portra 400 most recently and its very punchy looking. Another aspect is the purpose of the image. some 'arty' things can look moody and cool quite dark, whereas promotional things can be produced to look 'larger than life' (fast-food imagery being an obvious example). so do you render and balance in the dark or at night, or during the daylight ? and 'why ?'