Foot Candle Overview 2019.

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Presentation transcript:

Foot Candle Overview 2019

What is a Foot Candle? A Foot Candle is a measurement of light intensity defined by how much a uniform light source illuminates a one square foot surface. Image from https://blog.acdist.com/

Foot Candles vs. Lumens Lumens measure the total amount of light that a device produces. However, devices with the same number of lumens can look very different depending on their beam focus. Very dispersed light can provide a dimly lit room while very directed light can brightly illuminate small area. Lumens measure the output of the light source, while Foot Candles measure how bright the light will be across a room consistently. Image from: http://www.theledlight.com/lumens.html

Why are Foot Candles Important? Foot Candles are important for calculating the appropriate amount of illumination needed for different workspaces and environments. Improperly lit workspaces can negatively impact focus and productivity. Workspace Recommended Foot Candles Warehouse & Storage 10-30 Commercial Office 30-50 Educational Areas 25-125 Industrial 30-100 Grocery 10-100 Table info from https://www.lightingdesignlab.com/sites/default/files/pdf/Footcandle_Lighting%20Guide_Rev.072013.pdf/