Q:

# How do you convert 1,500 lumens to watts?

A:

To convert 1500 lumens to watts, first determine the luminous efficacy of the electric light source. Then take the number of lumens and divide this by the figure for luminous efficacy.

## Keep Learning

1. Determine the luminous efficacy of the light source

Each light source (LEDs, halogen lamps, etc.) has a fixed luminous efficacy. Identify the kind of electric light used, and then find the luminous efficacy using a table.

2. Insert figures into the formula

The data points should then be inserted into the formula: Watts = lumens / luminous efficacy.

3. Complete the calculation

Divide 1500 lumens by the luminous efficacy figure of the light in question with a calculator to determine the answer in this case.

Sources:

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