A really interesting affect that the switch to LEDs is having on TV and Film production.

LA's New LED Streetlights are Changing the Way Movies Look

Last year, the city of Los Angeles finished the "largest LED street light replacement project" in the world, as Forbes reported then, swapping 141,089 streetlights in what's just the first phase of a full switchover from sodium lighting. (LEDs are more efficient and last much longer, so the city will save massively on both electricity and maintenance costs.)

But LEDs, which cast a bluish light, look radically different from the old, yellowy high-pressure sodium lights, meaning a pretty straightforward municipal decision will translate into a completely new film aesthetic in one of the most-filmed cities in the world. (New York is planning on switching its lights out for LEDs too.)

At No Film School, Dave Kendricken writes that "In a sense, every night exterior LA-shot film previous to this change is rendered a sort of anthropological artifact, an historical document of obsolete urban infrastructure."