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.
Enhanced Turquoise. Enhanced Turquoise is a natural stone that has only been treated with either chemicals and heat, or just heat to enhance the color and harden the stone. This type of treatment keeps the color from fading over time and makes more of the harder turquoise available for the market.
Turquoise /ËtÉrkÉÉªz/ or /ËtÉrkwÉÉªz/ is the name of a greenish blue color, based on the gem of the same name. The word turquoise comes from the French for Turkish, as the gem was originally imported from Turkey. The first recorded use of turquoise as a color name in English was in 1573. The X11 color named turquoise is displayed on the right.