Yes yes and yes. I have a box of cheap self adhesive dots for the purpose. They're so cheap that the average blue light bleeds through them slightly, so anythin

Yes yes and yes. I have a box of cheap self adhesive dots for the purpose. They're so cheap that the average blue light bleeds through them slightly, so anything I actually do want to have an indicator I use one for, everything else gets two. I always assumed those Apple logos were just using the screen backlight rather than utilising an additional LED just for the logo.