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'Overcast February day in London' is only 5,000 lux at the surface, according to my lux meter.

You could achieve that with 750W of LEDs. Of course, that is still quite a lot of power.




Depends on distance. They make e27 screw in LED bulbs that will put out over 5,000 lux but you would need to hold the bulb pretty close to your face to get the full value of it.




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