Nothing will light up your day as a good squeeze on the Darth Vader flashlight, but there are alternatives for those who wants something more traditional.
This model will only light up as you press it, not “squeeze for X seconds and you will have light for X minutes”, like some other similar products. I guess you can always look at it as a good exercise.
The 10-LED Hand Pressing Flashlight ($11) is available from Gadget Brando.