- on an airplane- outside- in a darkened room
the Kensington Flylight is perfect for giving you enough light to see the keyboard without lighting up a room. The stalk is flexible, allowing for easy aiming--and the light curls up easily and can be stashed into a side pocket of your travel bag.
It's a gem...I love mine, and would buy another if I lost it.
Bonus idea: this could also be used with a desktop machine (probably need a USB extension) if you prefer a soft glow over your keyboard instead of an overhead light. It's also much cheaper than choosing an illuminated keyboard.