LED lighting badly suppresses human melatonin production at night
Regarding the quoted e-book study:<p>> Third, in the present study, the LE-eBook was set to maximum brightness throughout the 4-h reading session, whereas, by comparison, the print-book condition consisted of reflected exposure to very dim light.<p>Yeah, max brightness is probably going to make an impact. I bet if you were in a room with a bright light reading a book, with an equivalent amount of lumens going into your eyeballs, you'd probably have a tough time sleeping. This study seems like it was set up to generate a certain set of results. I wonder how it would look if the quantity of light was controlled for.<p>Additionally, the comparisons to the incandescent spectrum and the freaking out about the blue peaks (which seem pretty small) was over the top. The incandescent spectrum contains blue, and the "peak" of the other spectra would contain an equivalent integral of blue light as compared to a slightly brighter incandescent light.<p>Just turn the lights down low at night and get some warm spectrum bulbs and you'll be okay.