lack of light is generally the leading hypothesis for why there is a myopia epidemic actually. from people being indoors most of the time for school or work.
though unfortunately scientists are still researching if it is a specific frequency of light etc... people are missing
https://www.harborfreight.com/10000-lumen-4-ft-linkable-diam...
Also, if you've ever been in a Walmart or Forever 21 at night, you'll know that constant LED white light is probably not the best thing for your eyes.