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Incandescent bulbs give about 10 lumens of light per watt of electric power
Halogens give about 13 lumens per watt
CFLs give about 50 lumens per watt
So it depends on the type of bulb.
Wiki User
∙ 11y ago
Wiki User
∙ 10y agohow many watts 1 lux
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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.
1 watt equal to how many lux?
Lux is a measure of illuminance, or the amount of light hitting a surface. Watts, on the other hand, are a measure of power. The relationship between watts and lux depends on the characteristics of the light source and the distance from the source to the surface. In general, there is no direct conversion between watts and lux.
How do you calculate lux value for a light fixture?
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.
How many lumens on sunny day?
The illuminance of direct sunlight is approximately 100,000 lux, but normal daylight, which is filtered through a cloudy sky, is between 5,000 and 10,000 lux, while moonlight can be as little as 0.25 lux. About 1000 Lumen is equal to direct bright daylight .
What is equivalent lumens of 40 watt incandesent bulb to led light?
Light is a little complicated because various devices for producing it have various efficiencies. Light is measured in lumens. Older incandescent lamps produce 10-15 lumens per watt of electrical power. Halogen lamps produce maybe 20 lumens per watt and lasted much longer. Several years ago the best LEDs were also 20 lumens per watt. Now the best white LEDs are 5 to 10 times better than incandescent lamps, and they last for a decade or more. Expect almost all lamps to be LEDs in the next few years.
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.
What are the release dates for 1000 Lux - 2009?
1000 Lux - 2009 was released on: USA: September 2009
1 watt equal to how many lux?
Lux is a measure of illuminance, or the amount of light hitting a surface. Watts, on the other hand, are a measure of power. The relationship between watts and lux depends on the characteristics of the light source and the distance from the source to the surface. In general, there is no direct conversion between watts and lux.
What would you use to measure the brightness of a light bulb?
You can use a light meter to measure the brightness of a light bulb. This device measures the illuminance or luminance level produced by the light bulb and gives you a numerical value for its brightness in units such as lux or foot-candles.
How many lumens equal daylight?
The illuminance of direct sunlight is approximately 100,000 lux, but normal daylight, which is filtered through a cloudy sky, is between 5,000 and 10,000 lux, while moonlight can be as little as 0.25 lux. About 1000 Lumen is equal to direct bright daylight .
What is the lux or lumen level of a 18w and 36w and 58w t8 fluorescent tube and 13w and 18w plc reccessed downlight and 18w and 9w wall light and 8w exit light?
berapa besar Lux bohlam Metalhalide dibandingkan dengan lux bohlam PL-C 26 Watt
How do you calculate lux value for a light fixture?
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.
How many lumens on sunny day?
The illuminance of direct sunlight is approximately 100,000 lux, but normal daylight, which is filtered through a cloudy sky, is between 5,000 and 10,000 lux, while moonlight can be as little as 0.25 lux. About 1000 Lumen is equal to direct bright daylight .
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.
What is equivalent lumens of 40 watt incandesent bulb to led light?
Light is a little complicated because various devices for producing it have various efficiencies. Light is measured in lumens. Older incandescent lamps produce 10-15 lumens per watt of electrical power. Halogen lamps produce maybe 20 lumens per watt and lasted much longer. Several years ago the best LEDs were also 20 lumens per watt. Now the best white LEDs are 5 to 10 times better than incandescent lamps, and they last for a decade or more. Expect almost all lamps to be LEDs in the next few years.
When the moon phases change from new moon to full moon what happens to the amount of light?
Lux (lx) is the SI unit of illuminance A moonless clear night is around 0.0001-0.002 lux Quarter moon will give off 0.01 lux A full moon on a clear night will give 0.27 lux. For comparison, an overcast day is around 1000 lux, while diect sunlight is around 30,000-130,000 lux
