This guide explains how to provide room ambient light levels consistent with the guidelines of the Illuminating Engineering Society of North America (IESNA), a recognized technical authority of quality practices in the lighting industry. These are light levels that will cover all but highly specialized uses of a space.
The IESNA Guidelines are expressed in foot candles (FC) of illumination, a common measurement in the lighting industry. See the examples below for common lighting experiences expressed in foot candles:
This guide covers ambient lighting requirements, i.e. the light required for general circulation and occupancy of a room. For kitchens and bathrooms, because cabinetry, appliances, and fixtures are normally a part of initial construction, this guide includes task lighting recommendations for the primary task areas of the room.
The table below presents the IESNA Guidelines that apply to residential construction:
Table 1: IESNA Lighting Design Guidelines for Residences
|Horizontal FC||Vertical FC|
|• Counter, general||30||5|
|• Counter, difficult seeing||50||10|
|• Sink, general||30||5|
|• Sink, difficult seeing||50||10|