![]() Lumens and candela are units of measurement for lighting, but they measure different aspects of a lighting fixture. Step 3: Example: An LED luminaire produces 1.5 candela at a corner angle of 70 °, how many lumens does it produce? All you have to do is replace 1.5 cd and 70 ° C in the conversion formula, which will give you: 1.7lm. Step 2: Enter the candela and degrees into the formula: lumens = candela × (2π (1 – cos (degrees / 2))) . Step 1: Obtain the candela and the vertex angle in degrees of the light source. (These values are in catalogs and the internet). ![]() In other words, the formula to convert from candela to lumen is as follows: Steps to convert from candela to lumen When making the replacement of the formula of the steradians (2) in the formula of candela to lumen (1), we have the following: To convert from candela to lumens, the value of candela must be multiplied by the angular interval of the light source in steradians, as shown in the following formula (1): Where, is the symbol of the lumens to find and, is the symbol of the candelas, while, it is the symbol of the steradians that are defined by the following formula (2): Examples of how to convert from candela to lumen Candela to lumen formula.Definition of apex angle or vertex angle. ![]() In this article you will find the calculator, formulas, examples, explanation and steps to easily convert from candela to lumens. Lumens refers to the total amount of light that a lighting fixture emits, while candela refers to the amount of light emitted by a lighting fixture in a particular direction.
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