We are offering Illuminance in footcandles (fc) to lux (lx) conversion calculator to help you in the conversion process. all you need to do is to enter the illuminance in footcandles (fc) and press the = button to get the illuminance in lux (lx):

Lux to footcandles conversion formula

The illuminance E_{v} measured in lux (lx) is apparently equal to the vlaue of illuminance E_{v} in footcandles (fc), and totally divided by 0.09290304.

We are offering Electric power in watts (W) to illuminance in lux (lx) calculator to aid you in making calculations. Enter the value of power in watts, surface area measured in square feet / meters or the spherical radius in feet / meters and the value of luminous efficacy in lumens per watt, then hit the = button to get the illuminance in lux.

* the predefined luminous efficacy values can be called as the typical / average values.

Watts to lux calculation formula

Watts to lux calculation with area in square feet

The value of the illuminance E_{v} in lux (lx) is apparently equal to 10.76391 times the value of power P in watts (W), multiplied by the luminous efficacy η measured in lumens per watt (lm/W) which is divided by the surface area A measured in square feet (ft^{2}).

Watts to lux calculation with area in square meters

The value of illuminance E_{v} measured in lux (lx) is apparently equal to the power P measured in watts (W), multiplied by the luminous efficacy η measured in lumens per watt (lm/W) divided by the surface area A in square meters (m^{2}).

We are offering the Electric power in watts (W) to luminous flux in lumens (lm) calculator to let you have easy calculations. Enter the value of power in watts, and the value of luminous efficacy in lumens per watt and finally hit the Calculate button to find results for luminous flux in lumens.

* the predefined values of luminous efficacy are actually typical / average values.

Watts to lumens calculation

We all know that energy saving lamps have high luminous efficacy which is more lumens per watt. The luminous flux Φ_{V} measured in lumens (lm) is apparently equal to the power P in watts (W), multiplied by the luminous efficacy η measured in lumens per watt (lm/W).

We are offering Online calculator to make calculation from Millicandela (mcd) to lumens (lm), check now!

Millicandela to lumens calculator

Enter the values of luminous flux in lumens, and enter the values of apex angle in degrees and hit the equal to button to obtain luminous intensity in millicandela.

Millicandela to lumens calculation

The formula used to calculate the uniform, isotropic light source, the luminous flux Φ_{v }in lumens (lm) is apparently equal to the luminous intensity I_{v} measured in millicandela (mcd), multiplied by the solid angle Ω in steradians (sr) which is totally divided by 1000.

Φ_{v(lm)} = I_{v(mcd)} × Ω_{(sr)} / 1000

The value of solid angle Ω in steradians (sr) is apparently equal to twice the value of pi times 1 minus cosine of half the apex angle θ measured in degrees (°):

Ω_{(sr)} = 2π(1 – cos(θ/2))

The value of luminous flux Φ_{v }measured in lumens (lm) is apparently equal to the luminous intensity I_{v} measured in millicandela (mcd), multiplied by twice and half the apex angle θ measured in degrees (°) and finally divided by 1000.

We are offering the best online calculators to find Illuminance in lux (lx) to electric power in watts (W) to calculate.

You can simply enter the value of illuminance in lux, luminous efficacy in lumens per watt, with the surface area in square feet / meters or the spherical radius in feet / meters and hit the = button to find the value of power in watts.

* the predefined values of luminous efficacy are typical / average values.

Formula for Lux to watts calculation

Lux to watts calculation with area in square feet

The power P measured in watts (W) is apparently equal to the 0.09290304 times the value of illuminance E_{v} measured in lux (lx) multiplied by the surface area A in square feet (ft^{2}), and lastly divided by the luminous efficacy η measured in lumens per watt (lm/W).

Lux to watts calculation with area in square meters

The power P in watts (W) is apparently equal to the illuminance E_{v} in lux (lx), multiplied by the surface area A in square meters (m^{2}), which is divided by the luminous efficacy η measured in lumens per watt (lm/W).

We are offering online calculator to help you make calculations with Illuminance in lux (lx) to luminous flux in lumens (lm) to help you calculate.

You simply need to enter the illuminance in lux (lx), then select area unit type, and enter the radius in meters for spherical light source or the surface area which is measured in square meters for any light source and hit the = button to obtain the luminous flux in lumens (lm).

Lux to lumens calculation formula

Calculation with area in square feet

The value of luminous flux Φ_{V} in lumens (lm) is apparently equal to 0.09290304 times the value of illuminance E_{v} in lux (lx) multiplied by the surface area A measured in square feet (ft^{2}).

Φ_{V(lm)} = 0.09290304 × E_{v(lx)} × A_{(ft}2_{)}

The luminous flux Φ_{V} measured in lumens (lm) is apparently equal to 0.09290304 times the illuminance E_{v} measured in lux (lx) multiplied by the 4 times the value of pi multiplied by the squared sphere with radius r in feet (ft).

The luminous flux Φ_{V } measured in lumens (lm) is apparently equal to the illuminance E_{v} measured in lux (lx), multiplied by the surface area A measured in square meters (m^{2}).

Φ_{V(lm)} = E_{v(lx)} × A_{(m}2_{)}

The luminous flux Φ_{V} is apparently measured in lumens (lm) is equal to the value of illuminance E_{v} measured in lux (lx) times 4 times the value of pi multiplied by the squared sphere with radius r in meters (m).

We are offering the online calculator to find the value of Illuminance in lux (lx) to footcandles (fc) conversion calculator, make your calculations with ease now. All you need is to enter the values of illuminance in lux (lx) and hit the = button to find the values of illuminance in footcandles (fc).

Formula for Lux to footcandles conversion

The value of illuminance E_{v} measured in footcandles (fc) is apparently equal to the value of illuminance E_{v} in lux (lx) times 0.09290304.

We are offering online calculator to find value of Illuminance in lux (lx) to luminous intensity measured in candela (cd), check here.

Lux to candela calculator

All you need is to enter the illuminance in lux, then distance from the light source, select the value in feet or meters and finally hit the = button to calculate the luminous intensity in candela.

Calculation for Lux to candela

Find Lux to candela calculation with distance in feet

The luminous intensity I_{v} measured in candela (cd) is apparently equal to 0.09290304times the illuminance E_{v} measured in lux (lx), multiplied by the square distance from the light source d^{2} measured in square feet (ft^{2}).

Lux to candela calculation with distance in meters

The value of the luminous intensity I_{v} measured in candela (cd) is apparently equal to the illuminance E_{v} measured in lux (lx), multiplied by the square distance from the value of light source d^{2} measured in square meters (m^{2}).

We are offering Luminous flux in lumens (lm) to the electric power in watts (W) calculator, to help you making your calculation easy, check now! You can simply enter the luminous flux in lumens, and the luminous efficacy in lumens per watt and hit the = button to get the power in watts.

* the values of predefined luminous efficacy are the average values.

Formula for Lumens to watts calculation

The formula used for energy saving lamps have the high luminous efficacy (which are more lumens per watt). The power P calculated in watts (W) is apparently equal to the luminous flux Φ_{V} in lumens (lm), which is divided by the luminous efficacy η measured in lumens per watt (lm/W).

P_{(W)} = Φ_{V(lm)} / η_{(lm/W)}

Lumens to watts table

We are presenting here Lumens to watts table to help you in making easy calculations, check now!

We are offering the Lumens (lm) to millicandela (mcd) calculator to help you in calculations.

Lumens to millicandela calculator

All you need is to enter the luminous flux in lumens, apex angle in degrees and press the hit button to get the luminous intensity measured in millicandela.

Lumens to millicandela calculation

For the uniform, the isotropic light source, the luminous intensity I_{v} measured in millicandela (mcd) is apparently equal to 1000 times the luminous flux Φ_{v }which is measured in lumens (lm), and th whole has to be divided by the solid angle Ω measured in steradians (sr).

I_{v(mcd)} = 1000 × Φ_{v(lm)} / Ω_{(sr)}

The solid angle Ω which is measured in steradians (sr) is apparently equal to twice the value of pi multiplied by 1 minus cosine of half the apex angle θ calculated in degrees (°).

Ω_{(sr)} = 2π(1 – cos(θ/2))

The value of the luminous intensity I_{v} is apparently measured in millicandela (mcd) is apparently equal to 1000 times of the luminous flux Φ_{v }measured in lumens (lm), and divided by 2 times pi times 1 minus cosine of half the apex angle θ in degrees (°).