1100 Lumens to watts is typically between 9 watts and 17 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The outdated metric of using wattage to judge brightness is over, as LED lights use less power to produce the same amount of lumens and can differ according to design.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 know what is 1100 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:
An 1100 lumens A19 LED bulb will use 12.36 watts @ 89 lm/W
An 1100 lumen recessed ceiling light requires 13 Watts @ 85 lm/W
An 1100 lm flush mount ceiling light requires 13.75 watts @ 80 lm/W
A 12 W/m 70 LED 2700K strip creates 1100 lumens per meter @ 90 lm/W
A 4000K LED bulkhead ceiling light that creates 1100 lumens requires 12.5W circuit power @ 88 lm/W
A smart bulb creating 1100 lumens uses 8W of circuit power @ 113 lm/W
To convert 1100 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 efficiency 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 13.75 watts to produce 1100 lumens.
1100 lumens / 80 lumens per watt = 13.75 watts
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