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OUR NOTE: The standard measures for light intensity in physics or photobiology is energy (microwatts per sq cm), or photon count.
This paper confirms that light from a Lo-LIGHT tower is more than 10 times as efficient as devices with primary emissions from the blue portion of the visible spectrum, such as the Litebook® (peak emission at 465 nm).
One lux of 465 nm blue light has over 4 times the energy (4.37 times) as measured in watts per sq. m than does one lux of 500 nm green light;  Therefore 1500 lux of bue enhanced light from a Litebook® would provide about 10 times the energy or photon count as 350 lux from a Lo-LIGHT  tower.
1500 lux of 465 nm blue light has the same energy as (4.37x1500=) 6,500 lux of green 500 nm light.
The above graph shows that 350 lux GreenLIGHT tower was much more effective in melatonin suppression and induced twice as long of a phase shift as did 1500 lux blue-enhanced light (peak 465 nm) from a Litebook®, even though it provides less than 10% of the light intensity - when measured by energy/photon-count.

  

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