What is illumination level?

What is the level of illumination called?

Illuminance is the metric that is used to measure the light intensity within a space. It is measured in footcandles or lux – it is the amount of light (lumens) falling on a surface (over any given square foot or square meter).

How are illumination levels determined?

Determine the Needed Lumens A lumen is a unit measurement of light. 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.

What is illuminance value?

Illuminance is ‘The level of light on a surface; measured in lux (lx). Previously called the illumination value. It can be used as a reference measurement of the performance of a lighting system as related to the activity. ‘

Is lux a level?

A measurement of 1 lux is equal to the illumination of a one metre square surface that is one metre away from a single candle.

Definition of Lux.

Natural Light Condition Typical Lux
Direct Sunlight 32,000 to 100,000
Ambient Daylight 10,000 to 25,000
Overcast Daylight 1000
Sunset & Sunrise 400

How many lumens is normal daylight?

Daylight or direct sunlight has 120,000 lux or lumens of brightness.

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What is illumination physics?

1 : the action of supplying or brightening with light or the resulting state. 2 : the luminous flux per unit area on an intercepting surface at any given point. — called also illuminance.

What is illuminance and luminance?

Illuminance is measured as the amount of light striking a surface. … Luminance, is what we measure off of the surface that has light hitting it. Luminance is the measurement of the product of the incident light and the surface – anything that is reflected.

What are acceptable lux levels?

For precision & detailed works, the level of light may range between 1500 to 2000 lux. In homes- The recommended illumination levels for homes is often 150 lux. The living and dining rooms may work pretty well with about 25 to 50 lux.

How many Lux do you need for reading?

Recommended Light Levels by Space

Room Type Light Level (Foot Candles) Light Level (Lux)
Library – Reading / Studying 30-50 FC 300-500 lux
Loading Dock 10-30 FC 100-300 lux
Lobby – Office/General 20-30 FC 200-300 lux
Locker Room 10-30 FC 100-300 lux

Is Lux a lumen?

Lux: The amount of light that is cast on a surface is called illuminance, which is measured in lux. This can be thought of as light intensity within a specific area. Lumens: The total output of visible light from a light source is measured in lumens. … One lux is equal to one lumen per square meter (lux = lumens/m2).