Summary
This paper introduces three spectral indices to quantify the impact of different lamp types on melatonin suppression, photosynthesis, and star visibility, enabling more objective comparison of lighting technologies. Practically, the findings suggest that low-pressure sodium, phosphor-converted amber LEDs, and filtered 2700K LEDs pose lower risks to circadian health and the environment compared to high-pressure sodium lamps, informing more health- and environment-friendly lighting choices.
Key Findings
- Low pressure sodium, phosphor-converted amber LEDs, and LED 2700K lamps with Ledtech's Equilib filter showed lower or equivalent melatonin suppression potential compared to high pressure sodium lamps.
- Low pressure sodium, filtered LED 5000K, and filtered LED 2700K lamps had lower photosynthesis impact than high pressure sodium lamps.
- Three new spectral indices are proposed for standardized characterization of lamp spectra regarding melatonin suppression, photosynthesis impact, and star visibility.
Categories
The Science of Light: Proposes indices to characterize lamp spectra for melatonin suppression, photosynthesis, and star visibility across different lighting technologies including LEDs and fluorescents.
Sleep & Circadian Health: Evaluates spectral power distributions of various light sources for their potential impact on melatonin suppression relevant to circadian health.
Author(s)
L Bellia, G Barbato, A Pedace
Publication Year
2014
Related Publications
The Science of Light
- Phototransduction by retinal ganglion cells that set the circadian clock
- Color appearance models
- The mammalian circadian timing system: organization and coordination of central and peripheral clocks
- Diminished pupillary light reflex at high irradiances in melanopsin-knockout mice
- Melanopsin is required for non-image-forming photic responses in blind mice
Sleep & Circadian Health
- Phototransduction by retinal ganglion cells that set the circadian clock
- The mammalian circadian timing system: organization and coordination of central and peripheral clocks
- The two‐process model of sleep regulation: a reappraisal
- Melanopsin is required for non-image-forming photic responses in blind mice
- Strange vision: ganglion cells as circadian photoreceptors