Tool to measure foot candles

Here is a simple illustration that will help you understand the foot-candle measurement. Imagine setting a candle at a distance of 0. One lumen per square foot will illuminate this surface. Foot-candle is the most widespread lighting measurement in the industry.

The explanation for this choice dates back to the origins of the candle itself. When people began to measure the intensity of light, candles were the most common light source available. At that time, the candle-making industry provided a consistent, steady, clean, and efficient way to measure light.

Thus, we use this well-known expression, even to this day. The lumen is a significant entity: it measures the total amount of visible light emitted by a given source. All other measurements are based on the lumen. The Illuminating Engineering Society, IES, has recommended the following foot candle levels to ensure adequate illumination and safety for occupants.

Please refer to the below guideline to see where your facility should be and to assist in achieving appropriate light levels with the greatest energy efficiency. We pride ourselves not only on our knowledgeable sales team, but also on our unparalleled support of every product we sell.

At ACD, our focus is simple Topics: LED Lighting. Welcome to ACD Connect! We will be bringing you the latest industry news in Industrial Automation, features on new products and manufacturers, helpful Engineering tips and how-to's, as well as exciting company updates. Now hiring journeyman electricians, outside sales, estimators, and more The FSG Blog. The latest company updates, industry news, and expert analysis from FSG. Commercial Lighting What is a Foot-Candle? December 9, Share Article.

Share on Facebook. Share on Twitter. Share on Linkedin. Share on Email. Source: FSG. Source: iStock. Related Articles. Careers Find your Perfect Job Now hiring journeyman electricians, outside sales, estimators, and more I was looking for an app that could help me match lighting sources.

When replacing burned out sources, it's important to match the color temp of the replacement with other existing sources. So I downloaded this app in hopes that it would be a handy tool.

Not so much. I tested the app with two banks of fluorescent tubes, each was clearly either daylight or a much warmer color. If I could upload a photo, you would easily see the difference. Yet this app rated them at essentially the same degrees Kelvin, actual: 7 degrees different.

Maybe the eye and camera is very sensitive to color shifts and consequently it's too much to ask of an inexpensive app to resolve the difference. But using this app to chose replacement bulbs in a home or office would give unreliable results in matching sources.

We cannot generate consistent readings with this App. One of our consulting engineers placed a professional meter next to the App and got widely different readings. We didn't expect the App to be super accurate but hoped that it would give our designers "ball park" readings. The reality is it appears to be no where near close.