The best wavelengths of visible light for photosynthesis fall within the blue range (425–450 nm) and red range (600–700 nm). Therefore, the best light sources for photosynthesis should ideally emit light in the blue and red ranges.
The overriding theme of "The Pedestrian" is the danger of technological domination. The society depicted in the story may be technologically advanced, but it is also soulless, with people spending their evenings zoned out in front of mindless TV shows
