Created By : Vaibhavi Kumari

Reviewed By : Rajashekhar Valipishetty

Last Updated : May 17, 2023

The generally used units for measuring light include lumens, lux, and candelas. Lumen Calculator quickly and easily converts lumen to candela and lux to lumen units. Students must enter lighting levels in lumens and lux and then press the calculate button to get units in candela and surface area, as well as a full explanation.

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What are Lumens, Lux, and Candelas?

These three words characterise the most often used illumination measurement units. They're all connected, but they represent very distinct things.

Lumens:Lumens are a measure of luminous flux or the total quantity of light emitted by a source.

Lux:Lux is a unit of measurement for surface illumination, or, to put it another way, how much light is received by a surface.

Candela:The SI units of light intensity are candelas. It is the light that is emitted from a source in a specific direction, or per steradian.

The formulas for calculating lumens from candelas are about like this: lumens = candelas * Ω

If a light source produces light in all directions evenly, then Ω = 4π.

Alternatively, Ω = 2π * [1 - cos(θ/2)]

So, lumens = candelas * 2π * [1 - cos(θ/2)]

The following are the formulas for calculating candelas from lumens: candelas = lumens/Ω, Ω = 4π (or) candelas = lumens/(2π[1 - cos(θ/2)])

The formulas for calculating lux from lumen are as follows: lux = lumens/area, lumen = lux * area

1 footcandle = 10.764 lux

The formulas for calculating candela lux is lux = candela/distance²

FAQs on Lumen to Lux to Candela

1. How do you convert Lumen to candela?

The arithmetic underlying the wizard is rather simple. It converts the user-supplied beam angle into a solid angle in steradians. It then uses this information to finish the conversion by using the formula 1 candela = 1 lumen/steradian.

2. Is it possible to convert lux to candela?

Because candela and lux do not represent the same quantity, you cannot convert lux to candela.

3. Are lumens and lux the same thing?

One lux equals one lumen per square metre, it is used to measure the amount of light produced in a specific area. It allows us to determine the overall "amount" of visible light present on a surface as well as the intensity of the illumination.

4. What is the difference between the terms lux and candela?

The number of lux indicates how bright your surface will be. Candela is a unit of measurement for the visual intensity of a light source.

5. What exactly is the difference between lumens and candela?

The entire amount of light output by a lighting device is measured in lumens, which is represented by the letter L. The larger the area illuminated by a lighting device, the higher the lumens value.

6. What is the number of candles in a light bulb?

One 60-watt electric bulb, on average, produces the light of about 100 candles.

How to to Convert Lumen to Lux to Candela?

Look at the steps for calculating lumen from lux and candela units in detail. To find the solution, follow the rules and standards listed below.

  • Step 1: Get the light's candela units.
  • Step 2: Multiply the candela units by Ω or 2Ï€[1 - cos(θ/2)]
  • Step 3: The lux units are calculated by multiplying the lumens by the area.

Lumen to Lux to Candela Examples

Question 1:Determine the luminous intensity in candela if the luminous flux in lumens is 436 lm and the apex angle is 48°.


Given that

lumens = 436 lm

apex angle = 48°

The formula to calculate the candelas is candelas = lumens/(2π[1 - cos(θ/2)])

Candelas = 436/(2π[1 - cos(48°/2)])

= 436/(2π[1 - cos(24°)])

= 436/(2Ï€[1 - 0.91354])

= 436/(2Ï€(0.08645))

= 436/0.543

= 802.95

Therefore, the luminous intensity in candela is 802.95.

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