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.
There are two kinds of sodium lights: Low Pressure (LPS) and High Pressure (HPS). These lamps are mostly used for street lighting as well as industrial uses. The lamp works by creating an electric arc through vaporized sodium metal.