376
Signs like this could be found in the late 1800s/early 1900s, explaining this strange new technology. (media.piefed.world)
submitted 10 months ago by to c/justpost@lemmy.world
64 comments fedilink hide all child comments
 
you are viewing a single comment's thread
view the rest of the comments
[โ€“] 1 point 10 months ago (2 children)

In which way does electric lighting affect sleep?

Exposure to blue light affects sleep rhythm.

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 2 child comments
    •
  • [โ€“] 5 points 10 months ago (1 child)

    But when light bulbs were invented, they were incandescent and much redder and dimmer. If you burn them too hot, the filaments would melt. Therefore there wasn't much blue light if any released by early light bulbs

  • permalink
  • fedilink
  • source
  • parent
  • hideshow 1 child comment
    •