Not registered? Sign up to receive our email newsletter and access other members-only features.
 
more Share
Share & BookmarkX
|
Share This Link With A Friend

VIDEO: Lumens vs Footcandles

Having trouble viewing the video? Click here to download it.

The quantity of light is measured in multiple ways. Lumens and footcandles are two commonly used measures that also tend to be the most confusing. Understanding the difference can help you decide what type of light to use and how much you need for a space. Let's shed a little light on the matter.  

Lumens measure the light output from a source. The higher the lumen number, the more light a fixture gives off. But, a 10,000 lumen fixture is always a 10,000 lumen fixture. No matter whether you put it in a small room or a parking lot; it's always 10,000 lumens. 

Footcandles measure how much light is hitting a surface. This is more important when you're deciding how much light you need because it takes the space into account. Unlike lumens, footcandles can change depending on distance from the light source, ceiling and wall reflectance, objects in the way and more.

So, a 10,000 fixture in a small room is probably going to be very bright, while the same fixture placed high above a parking lot may not be bright enough. Light level recommendations developed by the Illuminating Engineering Society use footcandles to specify the minimum amount of light needed for a facility or application.

While lumens help you achieve the footcandle readings you're looking for, footcandle measurements can help you choose the right lights, design them with the right spacing and create the perfect lighting for your application. 

Are there other lighting terms that leave you fumbling in the dark? See The Truth Behind Lighting Industry Lingo.  

more Share
Share & BookmarkX
|
Share This Link With A Friend
Content provided for Johnson County REMC customers, Powered by Questline RelationshipBuilder. © Questline Inc.
Acceptable use and linking guidelines for this article
How would you rate the quality of this content?  Select a star rating and click submit below.
Comments or suggestions for additional content: (optional)
 

This message was sent by Johnson County REMC - 750 International Drive - Franklin - IN - 0