How many feet is a lambert?

How many feet is a lambert?

In other words, the range of foot lamberts for a darkened room would be 12 foot lamberts for the minimum, 22 foot lamberts for the maximum, and 16 foot lamberts as the ideal output for home theaters and commercial cinemas.

What do lamberts measure?

luminance
lambert, unit of luminance (brightness) in the centimetre-gram-second system of physical measurement. (See the International System of Units.) It is defined as the brightness of a perfectly diffusing surface that radiates or reflects one lumen per square centimetre.

What is the difference between foot candles and foot Lamberts?

Foot-lambert, luminance The luminance of a perfect lambertian diffuse reflecting surface in footlamberts is equal to the incident illuminance in foot-candles. For real diffuse reflectors, the ratio of luminance to illuminance in these units is roughly equal to the reflectance of the surface.

How do you convert lumens to feet of Lamberts?

Please provide values below to convert foot-lambert [fL] to lumen/square foot/steradian, or vice versa….Foot-lambert to Lumen/square Foot/steradian Conversion Table.

What is foot Lamberts lumens?

A foot-lambert or footlambert (fL, sometimes fl or ft-L) is a unit of luminance in United States customary units and some other unit systems. A foot-lambert equals 1/π or 0.3183 candela per square foot, or 3.426 candela per square meter (the corresponding SI unit).

What is a foot candle of light?

Footcandles are the most common unit of measure used by lighting professionals to calculate light levels in businesses and outdoor spaces. A footcandle is defined as the illuminance on a one square foot surface from a uniform source of light.

How do you measure CandlePower?

CandlePower is measured using a light meter that detects intensity on target in Lux (SI unit) or Foot-Candles (non-SI unit). The light meter is set at a distance from the light fixture and the beam of light is pointed at the Light Meter’s probe.

How do you convert lux to nits?

Multiply the nits value by π (“pi”): 3.14159. For example, 10 nits times π equals 31.4159. The previous result is nits converted to lux. With the example numbers, 10 nits equals 31.4159 lux.

How do you measure a foot-lambert projector?

Calculating foot lamberts is relatively simple. Take the brightness of your projector, divide it by the area of your screen in square feet then multiply by the gain of the screen.

Why is it called a foot-candle?

FOOT CANDLE DEFINITION A foot candle is a term used to measure the amount of light that falls on a surface that is 1 foot away from a singular candle. The term “foot candle,” sometimes abbreviated as FC, originated from a time when candles were the main light source available.

How do you determine 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.

What is difference between lumens and candlepower?

Candlepower and lumens measure different light qualities, and 1 candlepower equals 12.57 lumens. When measuring lumens, you can also think of it as the light illuminated in a 1-square-foot area one foot away from a single candle.