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.
Step 4: Make a Glowstick!
Update: Unless you have a big LED, I don't recommend a 9v battery. A 3v button cell is fine. The 9v actually burnt out some of my small LED's and heated up the leads on the big ones!