#### Lumens to Watts :

lm | ||

lm/W | ||

W |

##### Lumens :

- The lumen is the unit of luminous flux, a measure of the total quantity of visible light emitted by a source per unit of time, in the International System of Units.
- Then, the symbol of lumens is
**lm**.

##### Watts :

- The watt is a unit of power or radiant flux.In the International System of Units and then it is defined as a derived unit of 1 kg·m²·s³ or, equivalently, 1 joule per second.
- It is used to quantify the rate of energy transfer.
- Then, the symbol fo watts is
**W**.

##### Lumens to Watts :

- Lumen is the term used to describe the total amount of light emitted by a light source, while wattage merely indicates the amount of energy it uses.
- As lighting becomes more and more energy-efficient, the same number of lumens is being achieved with lower and lower wattages.

##### Formula :

- The formula used to calculate the following calculator lumens to watts is given below.
- Whether, Select the light source or Enter luminous efficacy in lumens per watt.
- Then, the calculation formula = Luminous flux in Lumens / Luminous efficacy in lumens per watt.
- Besides the formula this calculator works.

##### How to Calculate ?

- First, Enter the Luminous flux in lumens.
- Second, Select the light source or Enter Luminous efficacy in lumens per watt.
- Click “Calculate” to get the result and then if you want to clear values Click “Reset” in addition to clear the values.
- Finally, follow these steps to get the results.
- Then you will get as a Power result in watts.