The spectral G-Index is a variable that was developed to quantify the amount of short wavelength light in a visible light source relative to its visible emission (it is a measure of the amount of blue light per lumen). The smaller the G-index, the more blue, violet, or ultraviolet light a lamp emits relative to its total output. It is used in order to select outdoor lamps that minimize skyglow and ecological light pollution. The G-index was originally proposed by David Galadí Enríquez, an astrophysicist at Calar Alto Observatory.[1][2]
- ^ Junte de Andalucia (2018). Índice espectral G (PDF) (Technical report). Retrieved 12 February 2019.
- ^ Galadí-Enríquez, D. (February 2018). "Beyond CCT: The spectral index system as a tool for the objective, quantitative characterization of lamps". Journal of Quantitative Spectroscopy and Radiative Transfer. 206: 399–408. arXiv:1712.06825. Bibcode:2018JQSRT.206..399G. doi:10.1016/j.jqsrt.2017.12.011. S2CID 73564862.