Light bulb
A light bulb is a device that converts electrical energy into light. Modern incandescent light bulbs (see figure 1) are highly inefficient, with about 90% of the energy supplied to them being lost as heat[1]. This inefficiency sparked a need for a variety of more efficient electrical lights, which spawned several alternatives to the traditional incandescent light bulb. These include:
References
- ↑ A brief history of the light bulb [Online]. Available: http://www.bulbs.com/learning/history.aspx.