1000 Lumens to watts is typically 9 watts to 15 watts using LED, but is dependent on the efficiency of the light source.
The outdated metric of using wattage to judge brightness is over, as LED lights use less power to produce the same amount of lumens and can differ according to design. So a new comparison needs to be made.
To known what is 1000 lumens in watts, use each light source’s lumens per watt efficacy, typically:
Not all LEDs require the same amount of power to create the same light output. Here are some example products and their corresponding wattages:
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An 1000 lumens A19 LED bulb will use 11.2 watts @ 89 lm/W
EdisonPar 1000 Lumens A19 LED Bulb |
4000K Cold white LED bulb using 9 watts of power equivalent to 90W of tungsten lighting |
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9W LED |
An 1000 lumen recessed ceiling light requires 11.76 Watts @ 85 lm/W
An 1000 lm flush mount ceiling light requires 12.5 watts @ 80 lm/W
A 11.1 W/m 70 LED 2700K strip creates 1000 lumens per meter @ 90 lm/W
A 4000K LED bulkhead ceiling light that creates 1000 lumens requires 11.36W circuit power @ 88 lm/W
CORAMDEO Outdoor LED Bulkhead |
Decorative LED wall light with 1000lm 3000K brightness using 12.5 Watts of power. |
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A 3000K IP67 In ground LED uplight creates 1000 lumens to 16W of circuit power @ 62 lm/W
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To convert 1000 lumens to watts, we first need to know the efficacy of the light source.
Efficacy is a measure of how well a light source produces visible light. It is measured in lumens per watt (lm/W) or light output per watt.
A higher efficacy means more light for the same amount of power, with different light types and even different models from each manufacturer within a light type varying quite a bit.
For reference, here are some average lm/W efficacies for various light types:
The power in watts (W) is equal to the luminous flux in lumens (lm), divided by the luminous efficacy in lumens per watt (lm/W):
Watts = Lumens / Efficiency
For example, an LED with an efficiency of 80 lumens per watt would require 12.5 watts to produce 1000 lumens.
1000 lumens / 80 lumens per watt = 12.5 watts
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