Lumens (lm) to candela (cd) calculator and how to calculate.
Enter the luminous flux in lumens, apex angle in degrees and press the Calculate button to get the luminous intensity in candela:
Candela to lumens calculator ►
For uniform, isotropic light source, the luminous intensity Iv in candela (cd) is equal to the luminous flux Φv in lumens (lm),
divided by the solid angle Ω in steradians (sr):
Iv(cd) = Φv(lm) / Ω(sr)
So The solid angle Ω in steradians (sr) is equal to 2 times pi times 1 minus cosine of half the apex angle θ in degrees (°).
Ω(sr) = 2π(1 - cos(θ/2))
So The luminous intensity Iv in candela (cd) is equal to the luminous flux Φv in lumens (lm),
divided by 2 times pi times 1 minus cosine of half the apex angle θ in degrees (°).
Iv(cd) = Φv(lm) / ( 2π(1 - cos(θ/2)) )
So
candela = lumens / ( 2π(1 - cos(degrees/2)) )
Or
cd = lm / ( 2π(1 - cos(°/2)) )
Find the luminous intensity Iv in candela (cd) when the luminous flux Φv in lumens (lm) is 350lm and the apex angle is 60°:
Iv(cd) = 350 lm / ( 2π(1 - cos(60°/2)) ) = 415.7 cd
Find the luminous intensity Iv in candela (cd) when the luminous flux Φv in lumens (lm) is 370lm and the apex angle is 60°:
Iv(cd) = 370 lm / ( 2π(1 - cos(60°/2)) ) = 439.5 cd
Find the luminous intensity Iv in candela (cd) when the luminous flux Φv in lumens (lm) is 400lm and the apex angle is 60°:
Iv(cd) = 400 lm / ( 2π(1 - cos(60°/2)) ) = 475.1 cd
Find the luminous intensity Iv in candela (cd) when the luminous flux Φv in lumens (lm) is 500lm and the apex angle is 60°:
Iv(cd) = 500 lm / ( 2π(1 - cos(60°/2)) ) = 593.9 cd
Find the luminous intensity Iv in candela (cd) when the luminous flux Φv in lumens (lm) is 1000lm and the apex angle is 60°:
Iv(cd) = 1000 lm / ( 2π(1 - cos(60°/2)) ) = 1187.9 cd
Lumens to candela calculation ►
Our Lumens to candela Calculator allows the users to Calculate Lumens to candela . Some of the prominent features of this utility are explained below.
You don’t need to go through any registration process to use the Lumens to candela Calculator. Using this utility, users to Calculate Lumens to candela as many times as you want for free.
This Lumens to candela Calculator offers users the fastest Calculate. Once the user enters the Lumens to candela values in the input field and clicks the Calculate button, the utility will start the conversion process and return the results immediately.
The manual procedure of Calculator Lumens to candela isn’t an easy task. You must spend a lot of time and effort to complete this task. The Lumens to candela Calculator allows you to complete the same task immediately. You will not be asked to follow manual procedures, as its automated algorithms will do the work for you.
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You don't need to go through any registration process to use this Lumens to candela Calculator. You can use this utility for free and do unlimited Lumens to candela Calculate without any limitations.
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