Each group needs:

• incandescent light bulb (60 watt) with light socket/plug
• compact fluorescent light bulb (CFL, 13 watt) with light socket/plug
• LED bulb with light socket/plug
• infrared (IR) thermometer (available at Radio Shack or similar stores)
• ruler
• Student Worksheet, one per student
• (optional) watt meter, to confirm power

To share with the entire class:

• light meter