|LA Streetlights, before (left half) and after (right half) |
c/o LA Curbed and LA Bureau of Street Lighting
They're making the change because the new LED lights run far more efficiently and last longer. But an additional consequence of the change is a different visual appearance to nightscapes, which affects nocturnal on-the-spot painters, filmmakers, or anyone who is sensitive to the qualities of light.
|LA Streetlights, before (left half) and after (right half) c/o LA Curbed|
That older sodium vapor light is almost a monochromatic orange, as you can see from the solitary spike on the spectral power distribution chart at the lower left, which charts wavelength against output.
|Spectral Power Distribution of various light sources c/o NoFilmSchool|
Natural daylight (center top) is the standard, with all the colors well represented.
|Spectral Power Distribution for a Philips Lumileds LED|
Here's a chart for an LED light, but it's not one of the street-light LEDs that they're using in LA. LEDs can vary quite a lot in the quality of light they deliver, but the bottom line is that the light will be cooler and more natural than the creepy-zombie effect of sodium vapor lights.
It's also good news because the best best portable work lights for outdoor painters are the small LED lights, and the more you can match your work light to the subject's light, the more likely you'll choose the right colors for the painting.----
More in my book about light and color for painters:
Color and Light: A Guide for the Realist Painter
Read more online:
No Film School: "Why Hollywood Will Never Look the Same Again"
LA's New LED Streetlights Will Change the Way Movies Look