Light where we don't expect it

So far I have been enjoying this class and how it has changed my awareness of light in the world around me. However, I noticed recently that every day we use light resources that we may not appreciate for their lighting qualities. The other day, the power went out in my apartment for about two hours. When it was completely dark, my roommate and I realized that the only devices we had to light our rooms were our laptops and our cell phones. We ended up using our phones to light the outlets as we checked our electronic devices and used the laptops to light our rooms. This got me thinking about the unique kind of light that is emitted from these devices. While both give strong light sources, neither have visible lamps and the light seems to come from the screen and the keys. The light isn't obvious in daylight or electronic light, but in darkness it is possible to notice the slightly bluish glow they give off. This got me thinking how difficult it would be to imitate this kind of light with theatrical lighting. Most of all, this made me wonder where the light comes from in these electronics. Funny how studying lighting in theatre can make me notice light even in devices I take for granted every day.