Q:

How do you convert 1,500 lumens to watts?

A:

Quick Answer

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.

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Full Answer

  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.

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