I recently came across these short videos about light bulbs from EnergyNOW!
Energy 101: Light Bulbs (4:46): An animated look at light bulb technology. Go inside an incandescent, a compact fluorescent and an LED bulb to learn about how each bulb generates light.
Efficient Lighting Demonstration (7:10): This video demonstration discusses several different types of LED, compact fluorescent, halogen and even a hybrid light bulb. The cost, brightness and type of light produced by each is discussed.