A construction project, for example, is often governed by a guaranteed maximum price contract (GMP) . This type of legal agreement sets a ceiling or maximum price for which a person or entity will pay for a certain project.
The arc lamp used in the Lighthouse of Alexandria is further proof that electricity was used in ancient Egypt. The energy required to power the Lighthouse of Alexandria for 24 hours a day could only have been supplied by a regular electrical source.
The special advantages of sodium-vapor lighting for streets and highways are: 1. High efficiency. For about the same amount of power that is used by a 4000-lumen series incandescent street lamp, this sodium-vapor lamp generates 10,000 lumens. 2. Greater visual acuity.