Noun
the big light
(UK, informal) The main, usually central, light of a room in a house.
Who put the big light on? It's like Blackpool Illuminations in here!
I realised that you couldn't use the tools of yesterday to communicate today's world. Basically, that was the big light that went on in my head. Damien Hirst
It's just interesting that people don't really know about the roles that I play that are darker. I kind of do a huge blend of really big light things but also really dark indie things, and it just sort of happens to work out that way. Brittany Snow