At night.  Because the VC lighting does not work. I have installed the latest update/patches (assume these are cumulative - purchased the 777 recently).  I have searched here and elsewhere many times.  Others have the same issue. Some were solved by turning on the generators (mine are definitely on), while others' issues sadly seem to have remained unaddressed. 

My VC at night looks nothing like what you see in the video (posted by admins here) and CS main page screen shots in the links below. What isn't working are the limey green/yelllow instrument lights that illuminate the switches and labels. Can't fly without these.  In the video the switch - to the right - on the overhead turns these on but nothing happens when I do. For me, I just get the very faint flood light  you see in the video when just operating the overhead switch on the left.  Also, like others have posted, there is a "glare shield" switch but you only see light through the cracks like its positioned behind the panel - which isn't much use and looks nothing like in the screen shot below.  i have experimented by adding default vc light effects to the air.cfg using different coordinates but still no luck.  The problem actually does seem like the default coordinates are way off.  Please let me know if you have your vc lights working any better than what I have described.  :)

http://screencast-o-matic.com/watch/cDnUD01Q8y

https://www.captainsim.com/cgi-bin/imgview.pl?i=/products/x777/img/screenshots/v777_18.jpg;x=1

https://www.captainsim.com/cgi-bin/imgview.pl?i=/products/x777/img/screenshots/v777_35.jpg;x=1