For Wait Until Dark, I want to have the effect of mercury-vapor streetlights outside the window, and not the phosphor coated versions which are more white. These versions of the lamps are hard to come by today, but they were really prevalent in the 60s.
Mercury-Vapor Lamp on the side of a machinery shed near Bathgate, ND.
My grandparents farm still has one of these lamps in working condition, and fortunately I took a photo of it a while back. From the photo I was able to come up with a gel combination that would re-create that light. Combining R364 and R93 produces a very similar color with slight exaggeration of the green.