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What does LUX stand for?
The lux is the SI unit of illuminance, and is equal to 1 lumen per square meter.
How do you calculate a lux level in a room?
To calculate lux level in a room, you need to measure the illuminance using a lux meter. The lux meter records the amount of light falling on a surface per unit area. By taking measurements at different points in the room and averaging them, you can determine the overall lux level.
How many candelas equals 1 lux?
They really aren't equal because they measure two different things. However, they are related to each other.The Candela is the measure of the luminous intensity of a light source. A higher Candela number means a brighter light. Lux is a measurement of light density and means lumens per square meter. Again, a greater number of lux means that the surface being illuminated by the light is is receiving more light per square meter.The formula for calculating the conversion of candelas to lux is E = I/(D*D) where E is the Illuminance of the the surface in lumens per square meter (lux), I is the Intensity of the the light source in Candelas and of course (D*D) is the square of the distance from the light source in meters.Therefore 1 Candela will illuminate a surface with 1 Lux only at one meter from a light source. At different distances it will illuminate to different densities of light.For example: Solving for E, that same one candela light source would only read 1/4 lux at two meters [ 1/(2*2)] and 1/16 lux at four meters [1/(4*4)].If you know the lux at a given distance in meters from the light source you can solve for I and it will give you the intensity of the light in Candelas. From that you can calculate the intensity of the light.For example: Solving for I, multiply the lux times the square of the distance in meters and you will have the intensity of the light source in Candelas.So a reading of 8 lux at a distance of 3 meters would mean that the light source has an intensity of 8*3*3 or 72 candelas.
How many 40-watt fluorescent lights can produce 1000 lux?
To achieve 1000 lux, you would need approximately 6-7 40-watt fluorescent lights per square meter. Lux is a measure of illuminance, so the number of lights required can vary depending on factors such as the height of the lights and the reflectivity of the surfaces in the room.
How many lux is a 250w halogen bulb?
A 250W halogen bulb typically produces around 5000-6000 lux at a distance of 1 meter. Lux is a measure of illuminance, or the amount of light falling on a surface.
How do you find out lumen from lux?
There's not a direct conversion, but both are based on the candela, a unit of luminous intensity. There is a nice explanation of the difference between lumens and lux at http://en.wikipedia.org/wiki/Lumen_(unit).Lumens is the total amount of light a light source (a light bulb, for instance) throws in all directions. Lux (lumens per square meter) can measure how intense light from that light source is when looking toward it from a certain distance. Lux depends greatly on how far away you are from a light source. At any given instant, light is thrown from the source in a perfect sphere.If you are trying to calculate how many lumens your light bulb shines and you have a light meter that gives you lux, point your meter at the light, then take your lux multiply by 12.57 (pi times 4). Then, multiply this by the distance of your light meter from the light bulb (in meters) squared. That will give you the lumens of the light bulb. In equation form, where lm is lumens, r is your distance from the light source, and pi is (come on) about 3.14, lux=lm/(pi*4*(r^2)), or lm=lux*pi*4*(r^2). The (pi*4*(r^2)) part is used to calculate the surface area of a sphere around the light source.Note: this calculation does not account for reflected light, and will only work on an exposed light bulb. Lights housed in a reflective cone (like in a flashlight) are designed to project light in one direction and (within the spot where light is projected) will have a lux much higher at any given distance than if the light bulb wasn't housed in a cone.AnswerA lux is a special name given to a lumen per square metre. To convert lux to lumens, you need to multiply the illuminance (light arriving) on a surface, in lux, by the area of that surface, in square metres.
Instrument used by umpire in cricket to measure light intensity?
lux meter or light meter
Which is best 1.5 lux or 3 lux camera?
1.5 lux is better then 3 lux camera because 1.5 Lux camera can work in more dark area then 3 lux
What is a measure of light called?
A measure of light is called illuminance, which refers to the amount of light that falls on a surface. It is typically measured in lux or foot-candles.
What is illuminance?
Illuminance is the amount of light that falls onto a surface per unit area. It is measured in lux (lumens per square meter) and indicates how bright a space is for human eyes to perceive. Illuminance is an important factor in lighting design to ensure adequate visibility and comfort.
What is measured using lux?
Lux is used in measuring luminous flux per unit area.
What is sunlight measured in?
Sunlight is typically measured in units of irradiance, which is the amount of power received per unit area, often expressed in watts per square meter (W/m²). Another measurement used for sunlight is illuminance, which is the amount of light perceived by the human eye and is measured in lux.
