For building owners and managers striving to meet fire and safety codes, “dual-technology” exit signs that combine the efficiency of light-emitting diode (LED) lighting with new photoluminescent (PL) materials can help increase reliability and performance over decades of use.
An extensive renovation to the Indian Trails Public Library District in Wheeling, Illinois, resulted in a modern and engaging learning space for the public. The library now occupies more than 5574 m2 (60,000 sf) and is well-equipped with more than just books—interactive labs and classrooms for community education programs, a dedicated youth area with puzzles and a large touchscreen monitor, and an overarching atmosphere inspiring collaboration and creativity.
Human sight evolved to optimize vision under diffuse sky radiation, and this remains the best illumination conditions for most of our activities. Luminous ceilings are an attempt to reproduce the qualities of such overhead lighting in an indoor environment.
Explored in the August 2017 issue of The Construction Specifier, a luminous ceiling system is designed to provide a substantially uniform level of illuminance throughout the room below. The entire ceiling is, in effect, one large luminaire consisting of a continuous surface of light-transmitting material of a diffusing or light-controlling character, with light sources mounted above it. This article examines construction costs and maintenance requirements.
The American Medical Association’s (AMA’s) recent report, “Human and Environmental Effects of Light-emitting Diode (LED) Community Lighting,” has ignited controversy in the lighting industry with its recommendations regarding blue light.