For humans, nonvisual biological effects, which can be parameterized by the circadian
action factor (CAF), are important for their health and work performance. In this paper, an …

Alloy core/shell Cd_xZn_1-xS/ZnS quantum dots (QDs) are emerging as robust candidates
for light-emitting diodes (LEDs), however the emission range of the current Cd_xZn_1 …

The spectral optimization of phosphor-coated white LED (pc-WLED) with green and orange
phosphors excited by blue chip for road lighting was investigated based on the mesopic …

The photometric model for the mesopic luminous efficacy (LE_m) of hybrid white LEDs,
including the radiant efficiency of both blue and red LEDs as well as the overall quantum …

Outdoor light sources must guarantee excellent mesopic luminance (Lmes) for traffic safety
at night. Here, we propose a solution to improve mesopic-related parameters, which include …

White light‐emitting diodes (WLED s) for road lighting are required to have both the high
scotopic to photopic ratio (S/P) and color rendering index (CRI). However, there is a trade …

This study attempts to quantify and optimize the luminous efficacy of radiation (LER) of
trichromatic light sources in both photopic and mesopic visions. A new chromaticity-guided …

Scotopic/photopic ratio (S/P ratio, or R_sp) is an absolute measure of a light source's
performance under the mesopic vision state. However, there is more potential for a light …

Recently, interest in convenience facilities for road safety and urban aesthetic conditions
increased needs to improve visibility and color recognition of night road lightings. To meet …