Retrofitting

The reflectance of the walls and floor is a determining factor in calculating the ambient light level in a space by the zonal cavity method. One way to increase the light level without spending additional […]

Lighting fixtures recessed in the ceiling need to have a way to get rid of all the heat generated by the lamp(s). Fixtures are designed with openings to allow warm air to rise by convection […]

This project is predicated on two things: (1) the circuiting of the existing overhead lights makes it impossible to use less than one- fourth of the light in a given space, and (2) people often […]

Whenever a person leaves a room, it should be convenient to extinguish all the lights. Even small rooms with two doors need a switch at each entrance unless the doors are close to one another. […]

There is more to lighting than just being able to read comfortably. Visual comfort should not be neglected just to save electricity. Some defining principles for every illumination retrofit include: 1. Luminaire efficiency, measured in […]