Lighting requirements, audience requirements, audience requirements, and TV broadcast broadcast personnel provide high-quality TV screens. When the football field starts, it is necessary to light up a football field. How much liquidity? This article will help you find out  how to How to calculate the lumens of LED stadium flood lights?

1, What is lumen?

2, How to calculate the lumens of LED stadium lights?

## Section 1: What is stadium light lumen?

A.The Definition of lumens

The so-called lumens refer to the solid angle of candlelight (cd, Candela Candela, luminous intensity unit, equivalent to the luminous intensity of ordinary candles) corresponding to 1 square meter on a unit sphere with a radius of 1 meter.

If a light source emits one candela of light uniformly through a solid solid angle, the total luminous flux emitted into that angle is 1 lumen (1 cd 1 sr = 1 lm). Alternatively, an isotropic one-Kandel light source emits a total luminous flux of exactly 4π lumens. If the light source is partially covered by an ideal absorbing hemisphere, the system will radiate half the luminous flux – only 2π lumens. The luminous intensity is still 1 candela in those directions that are not blurred

Lumens can be thought of casually as a measure of the total amount of visible light in a particular beam or angle, or emanating from a light source. The number of candelas, or lumens, from a light source also depends on its spectrum, expressed in the photometric function by the nominal response of the human eyes.

B.What is difference between lumen and lux?

The difference between lumens and lux is that lux takes into account the area over which the luminous flux spreads. A flux of 1000 lumens is concentrated on an area of ​​one square meter, illuminating the square meter with an illumination of 1000 lux. The same 1000 lumens, distributed over 10 square meters, produce a brightness of only 100 lux. Mathematically, 1lx = 1lm/m2.

A light source with a power of 1 watt, its color is the most effective color for the human eye (wavelength of 555 nanometers, in the green region of the spectrum), and its luminous flux is 683 lumens. Thus, one lumen represents at least 1/683 watt of visible light power, depending on the spectral distribution.

## Section 2: How to calculate Lumens of LED stadium lights?

Lumens are the units of luminous flux. The total amount of light emitted from the light source, expressed as F. The unit is lumens (Lm). The luminous intensity of the point light source is 1 canopy, and the luminous flux emitted at a unit solid angle (1 steradian) is “1 lumen”.

Since the output luminous efficacy of MECREE LED lights is 150 lm/W, the lumens of a 1000W stadium lights = 1000W x 150 lm/W = 150,000 lumens.

Bbier LED stadium lights is range from 100w-5000w, and the lumen of the LED stadium lights are 15000lm , 30000lm, 45000lm, 60000lm, 75000lm, 90000lm, 120000lm, 150000lm, 180000lm, 300000lm, 450000lm,600000lm, 750000lm.

Lumens to lux calculator

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.

1 lux equals 1 lumen per square meter (lux = lumens/square meter). Essentially, as light travels from the emitter, it is scattered across the area. The farther light travels, the more it is scattered. Thus, the amount of lux in an area or a surface can vary depending on the distance the light travels and the angle at which it is dispersed.

When the lumens provided by a given emitter are the same, light with a shorter travel distance and/or a narrower focus will appear brighter because the lux is concentrated in a smaller area rather than a longer travel distance and spread out over a larger area of light.

Lumens to lux calculation formula

Calculation with area in square feet

The illuminance Ev in lux (lx) is equal to 10.76391 times the luminous flux ΦV in lumens (lm) divided by the surface area A in square feet (ft2):

Ev(lx) = 10.76391 × ΦV(lm) / A(ft2)

The illuminance Ev in lux (lx) is equal to 10.76391 times the luminous flux ΦV in lumens (lm) divided by 4 times pi times the squared sphere radius r in feet (ft):

Ev(lx) = 10.76391 × ΦV(lm) / (4⋅π⋅r(ft)2)

Calculation with area in square meters

The illuminance Ev in lux (lx) is equal to the luminous flux ΦV in lumens (lm) divided by the surface area A in square meters (m2):

Ev(lx) = ΦV(lm) / A(m2)

The illuminance Ev in lux (lx) is equal to the luminous flux ΦV in lumens (lm) divided by 4 times pi times the squared sphere radius r in meters (m):

Ev(lx) = ΦV(lm) / (4⋅π⋅r 2(m2))

How to convert lumens to watts?

This measures the amount of electricity a light bulb consumes. For example, a 100-watt bulb consumes 100 watts of electricity every second it is on. The higher the wattage, the more electricity you’ll pay for.

How to convert luminous flux in lumens (lm) to electric power in watts (W)?

You can calculate watts from lumens and luminous efficacy.  Lumen and watt units represent different quantities, so you can’t convert lumens to watts.

Lumens to watts calculation formula

The power P in watts (W) is equal to the luminous flux ΦV in lumens (lm), divided by the luminous efficacy η in lumens per watt (lm/W):

P(W) = ΦV(lm) / η(lm/W)

So watts = lumens / (lumens per watt) or W = lm / (lm/W)

Example

What is the power consumption of a lamp that has luminous flux of 900 lumens and luminous efficacy of 15 lumens per watt (lm/W)?

P = 900 lm / 15 lm/W = 60 W

Section 3: How many lumens do you need to light up a football field?

Football led light has their own rules and standards requirement. Different lux level required for football stadium will have different lumens requirement.

1，Training and entertainment 200lux

For a standard football field, need about 360,0000lm to light up a soccer pitch.

2，Amateur competition 300lx

For a standard football field, need about 420,0000lm to light up a football stadium.

3，Professional competition 500lx

For a standard football field, need about 600,0000lm to light up a football stadium.

4，General tv broadcast 1000lx , TV emergency 1000lx

For a standard football field, need about 126,000,00lm to light up a football stadium.

5，HDTV large international competitions 1400lx

For a international standard football field, need about 309,000,00lm to light up a football field.