A light bulb is an energy conversion 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. 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:
- Flickr [Online], Available: https://www.flickr.com/photos/jamesrbowe/3338776771
- Bulbs. (Accessed Sept. 3, 2015). A brief history of the light bulb [Online], Available: http://www.bulbs.com/learning/history.aspx.