Hollywood Gaffer Julian White discusses the myriad different sources of light that are used on a film set. He gives his expert opinion on the different lights involved in films such as Titanic (1997), A Star is Born (2018), Skyfall (2012) etc, as well as their differing effects. This piece by Cook Optics TV compares shots of the behind the scenes lighting setups, side-by-side with the final product frames from the actual films.