800 Lumens to watts is typically 8 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The outdated metric of using wattage to judge brightness is over, as LED lights use less power to produce the same amount of lumens and can differ according to design.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 800 lumens in watts, use each light source’s watts to lumens efficacy. Common examples are:
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 800 lumens A19 LED bulb will use 9 watts @ 89 lm/W
An 800 lumen recessed ceiling light requires 10 Watts @ 77 lm/W
An commercial recessed downlight with an 800 lumen output requires 8 Watts of circuit power @ 100 lm/W
An 800 lm flush mount ceiling light requires 10 watts @ 80 lm/W
A 9.6W/m 140 LED 3000K strip creates 816 lumens per meter @ 85 lm/W
To convert 800 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 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 10 watts to produce 800 lumens.
800 lumens / 80 lumens per watt = 10 watts
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