181 Congo Blue filter. Pic: Lee Filters Exploring the evolution of LED lighting in cinematography, from red light solutions to the challenges of achieving deep blue and ultraviolet effects for more natural skin tones. It’s easy to assume that the battle for really good lighting was pretty much over. The conversation is often about illuminating people, and people are mostly some variety of reddish-brown, so we’ve been mostly interested in making LEDs emit red light. Since the very first commercially available visible-light LEDs were red, it didn’t ta…