The Necrons are in my opinion one of these armies which you can build relatively quickly, once you will feel an urge to expand your gaming range. At least, this is true at an average level of painting. However, the situation can be quite different if one wants to get from his models a little more than usual ...
Illuminated Necron Monolith model by Cytadela.pl:
Movie part 1, Movie part 2, Movie part 3, Movie part 4.
(The comments are in polish language but the picture shows the point.)
While I'm far* from going into the Necrons, this kind of bedside lamp is very tempting to construct.
(*) for the moment, :-)