When I was a kid my parents were often telling me to not read or work under dark light conditions. If they came into my bedroom and saw me study without the main light, or my desk lamp was off, for example when my book or worksheet was shaded, they asked me to turn them on. They would tell me “it’s bad for your eyes to work without enough light“. While as a kid I wasn’t too thrilled about the constant reminders I think they did the right thing. To this day I don’t need reading glasses.
Now there are new light technologies coming out. There is skepticism whether LED lights provide the right type of wavelength. LED lights save energy but emit little infrared. Let’s look at some of the properties of natural sunlight