As I was walking through the hallways of my dorm yesterday, I realized how the light shining through the peephole looked almost exactly a white HAL 9000 light. So, I decided to make a small LED light that would fit inside the peephole, and make it look like one of HAL's "eyes".
Step 1: Requirements
Since I live in a dorm, there were multiple constraints that I had to work within.
The design must not limit the functionality of the peephole. Thus, the device must be either transparent, or easily removable.
It must not modify the peephole in any way.
The design must be low powered, I don't want to have 50 watts of power pumping into my dorm room.
And of course, since I am a poor college student, it must be low-cost.