Quick Answer: How Do You Use A Foot Candle Light Meter?

How do you read foot candles?

Take a beam of light and measure its intensity at one foot away from the source and that will give you the foot candle reading.

Take the same beam of light and measure it from one metre away from the source and that will give you the lux measurement.

One footcandle equals 10.764 lux..

How do you use a light meter for plants?

The method we use is to hold the light meter as close to the leaves of the plant as possible, with the sensor pointed away from the plant, in the direction of the incoming light.

How bright is 30 foot candles?

To determine the needed lumens, you will need to multiply your room square footage by your room foot-candle requirement. For example, a 100 square foot living room, which needs 10-20 foot-candles, will need 1,000-2,000 lumens. A 100 square foot dining room, which needs 30-40 foot-candles, will need 3,000-4,000 lumens.

How many foot candles does a plant need?

Medium light intensity plants prefer 250 to 1,000 foot-candles. Best growth occurs above 750 foot-candles unless plants also receive extended periods of direct sunlight. Give them artificial light in the 500 to 1,000 foot-candle range, or 15 or more watts per square foot of growing area.

What is used to measure light?

Lighting professionals use a light meter (also called an illuminance meter or lux meter) to measure the amount of light in a space/on a particular work surface.

What is a foot candle light meter?

A foot-candle (or foot-candle, fc, lm/ft2, or ft-c) is a measurement of light intensity. One foot-candle is defined as enough light to saturate a one-foot square with one lumen of light. … Store environment: 5 fc.

How do you measure a foot candle with a light meter?

Picture a candle set in the middle of a sphere measuring 0.60 meters (2 feet) in diameter. If we cut a hole that measures 0.09 square meters (1 square foot) in the centre of this sphere, the light that shines through is what we define as a lumen. A foot-candle equals one lumen per square foot.

How many foot candles is too bright?

Offices with more intensive use and showrooms will need brighter lighting provided by 50 to 100 foot-candles, or 500 lux. Very intricate, exacting and detailed work may require 1,000 to 2,000 foot-candles, or 10,000 to 20,000 lux.

What does 5 foot candles mean?

Believe it or not, foot candles are the most common unit of measure used by lighting professionals to calculate light levels in businesses and outdoor spaces. In a nutshell, a foot candle is a measurement of light intensity and is defined as the illuminance on a one-square foot surface from a uniform source of light.

How many lumens is a 60 watt bulb?

800 lumensThat takes lumens. Lumens measure brightness. A standard 60-watt incandescent bulb, for example, produces about 800 lumens of light.

What is bright indirect light?

What is bright indirect light for plants? Bright Indirect light is when the sun’s rays don’t travel directly from the sun to your plant but, instead, bounce off something first. Plants in bright, indirect light will cast blurry, indistinct shadows.

How many watts is a foot candle?

You can also calculate the number of watts directly from the foot-candles by combining both equations and using the following: Watts = Foot Candles x 0.01609696 This is because 10.76 x 0.001496 = 0.01609696).

How do I know if my plants are getting enough light?

If your plant is not getting enough light, the most common sign is the yellowing and dropping of leaves, stunted leaf growth, elongated stems, and a dull-green color. If your plant is getting too much light, then its leaves will have singed tips, burned patches, or will be falling off (yikes!).

Do light meter apps work?

In all, light meters are working, accurate tools for your smartphone. … And, as you can see, there are multiple light meter apps for your iOS or Android device.

Can a lux meter Measure LED light?

LED Light Meter LED lights produce white light very differently to incandescent lights. A traditional lux meter may give an accurate reading of 500 lux, but the human eye can’t visibly see all 500 lux and may actually only be able to see 300 lux.

How many foot candles are in a 100 watt bulb?

400 foot candlesThis means that a 100 watt bulb will generate 400 lumens – TOTAL. (Here’s the big leap) Now, if we COULD reflect all of that 400 lumens onto 1 square foot we would get a light intensity of 400 foot candles.

How many foot candles is direct sunlight?

Light LevelsOutdoorFCLUXDirect Sunlight10,000100,000Full Daylight1,00010,000Overcast Day1001,000Dusk1010020 more rows

How many lumens is 10 foot candles?

Determine the Needed Lumens For example, a 100 square foot living room, which needs 10-20 foot-candles, will need 1,000-2,000 lumens. A 100 square foot dining room, which needs 30-40 foot-candles, will need 3,000-4,000 lumens. See PDF and complete foot candle index.

How many foot candles is low light?

Plants referred to as low light intensity plants generally should receive between 50 and 250 foot-candles. Medium-light plants prefer 250 to 1,000 foot-candles. Best growth occurs above 750 foot-candles unless plants also receive extended periods of direct sunlight.

How many candlepower is a 60 watt bulb?

Your average 60 watt household light bulb produces 650 to 700 lumens when burned under standardized conditions. Therefore you can estimate that a 60 watt household light bulb, burned under average household conditions might produce somewhere between 50 and 55 candle power, give or take…

How many foot candles do I need in a workshop?

Recommended Light Levels by SpaceRoom TypeLight Level (Foot Candles)Light Level (Lux)Retail Sales20-50 FC200-500 luxStairway5-10 FC50-100 luxStorage Room – General5-20 FC50-200 luxWorkshop30-75 FC300-750 lux22 more rows•Mar 3, 2020