This instructable is now featured in Popular Science magazine! February 2010, page 79. Look for "originally posted by Shane Dulong on instructables.com"
Step 1: Supplies
- Battery (3 volts or bigger, within reason)
- 1 LED of your choice (4 shown)
- 1 Bic pen with translucent (partially see-through) case
Step 3: Light!
Note: The long lead (wire) is the positive. The negative has a small notch above it on the plastic.