I use a bank of blue LEDs aimed up at a white ceiling for the winter so I spent some time looking into the question. I didn't find anything very definite or con

I use a bank of blue LEDs aimed up at a white ceiling for the winter so I spent some time looking into the question. I didn't find anything very definite or concerning. Note that there is a whole snake oil thing going on with blue light these days. Some of what we see about this stuff might be coming out of that particular industry.