How do you calculate foot-candles?

Multiply the Length times the Width of the Room to get the Room Square Footage. For example, if the room is 10 feet wide and 10 feet long, the Room Square Footage will be 100 square feet. A foot-candle is how bright the light is one foot away from the source.

How bright is 50 foot-candles?

For example, 50 foot-candles would be 50 x 10.76 = 538 lumens.

What is the lux formula?

The Calculation of LUX level in a room The LUX level in a room is calculated from the following formula. E(LUX) = F(lm) x UF x MF / A. Where. E is the the LUX level achieved. F is the average lumens value form the light source.

What is the relationship between the units foot-candle and lux?

A foot-candle equals one lumen per square foot. This is a British measurement. Using the metric system, a lumen is measured by a square meter or a lux. Thus a foot-candle is equivalent to approximately 10 lux or 10.57 lux.

How many foot candles are in a 100 watt bulb?

Their efficiency is in the range of 4 lumens per watt. This 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 lumens is 10 foot candles?

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….Key Terms.

Room	Foot Candles Needed
Kitchen Sink	70-80
Dining Room	30-40
Bedroom	10-20
Hallway	5-10

How many foot candles is too bright?

A requirement of 20 foot candles is recommended for general spaces in offices. In areas where reading and detailed tasks are carried out, 50 foot candles of lighting is sufficient. Conference rooms and other areas where visually challenging tasks are occasionally performed may incorporate between 10-20 foot candles.

How many foot candles is a 60 watt bulb?

Adequate lighting means a light intensity of 20 foot-candles (approximately equivalent to a 60 watt bulb at a clear distance of 5 feet).

What is the difference between lux and par?

Why Lumens, Lux, and PAR Differences Matter Lumens and lux refer to light intensity as it is perceived by the human eye. PAR, on the other hand, tells you something about the quality of light as plants perceive it.

How many lumens is 150 square feet?

As a handy rule of thumb, a sitting room or bedroom will generally require around 10-20 lumens per square foot, while a bathroom or kitchen will need a stronger level of lighting, at around 70-80 lumens per square foot. To work out the lumens you need, simply multiply the square footage of the room by this figure.

How many foot candles are in Lux?

Public areas surrounded by dark areas will generally require 2 to 5 foot-candles, or 20 to 50 lux, while typical offices and classrooms without highly detailed work will need 10 to 20 foot-candles, or 200 lux.

How many lumens in a foot candle?

Thus one foot-candle is equal to one lumen per square foot or approximately 10.764 lux.

How to calculate foot candle?

6 How to measure the foot candle? Measuring the Light Intensity I will use the light meter to measure the number of foot-candles that there are hitting the subject. Converting to Lumens Please note that one foot-candle = 10.76 Lumens*, which means that in order to convert foot-candles to lumens, I would need to take the amount Converting to Watts

What is the formula for Lux?

You can use the ” E = Φ / A ” formula where: E is the illuminance or lux. Φ or “phi” is the luminous flux formula in lumens. And A is the surface area where the light touches (m 2)

How do you calculate foot-candles? Multiply the Length times the Width of the Room to get the Room Square Footage. For example, if the room is 10 feet wide and 10 feet long, the Room Square Footage will be 100 square feet. A foot-candle is how bright the light is one foot away from the…