I made a video podcast for the project below.
Please check out my other instructables as well.
Step 1: Materials
All you need for this project is:
LED Flashlight (I got 3 for $9 from Home Depot and made 2 dive lights) The lights should also have a push-button switch with a rubber seal and rubber seals at the threaded joints.
A drill with a small bit (I used a 3/64")
A small tupperware container
A small bottle of mineral oil (its a laxative so get it at a pharmacy for a few $)