SODIUM ROADIUM 5.11 2022 – 12.2 2023   “The recently developed sodium vapor lamp gives promise of future importance, particularly for such uses as highway illumination.” - Effect on the Eye of the Yellow Light of the Sodium Vapor LampAugust 10, 1934, United States Public Health Service   Bildkonstnär Terhi Nieminens och filmfotograf Iris Kärkkäinens