Lighting devices emitting a warm, orange-toned illumination intended for use during the evening hours fall under this category. These products often utilize light-emitting diodes (LEDs) or incandescent technology to produce a spectrum of light with reduced blue wavelengths. A common application is in bedrooms, hallways, and nurseries to provide gentle illumination that does not disrupt sleep patterns.
The value of utilizing this type of lighting stems from its minimal impact on melatonin production. Melatonin, a hormone crucial for regulating sleep-wake cycles, is sensitive to blue light. Exposure to blue light at night can suppress melatonin secretion, potentially leading to sleep disturbances. The reduced blue light emission characteristic of these products makes them a preferable alternative to standard white or blue-enriched light sources for nighttime use. Historically, before the advent of widespread electric lighting, individuals relied on natural light sources like firelight, which also produced a similar warm-toned illumination. This suggests a biologically-driven preference for warmer light at night.
