U-HID is a type of lamp. A mixture of two physical principles in lighting electronics, U-HID is the combination of Plasma and High Intensity Discharge (HID) technologies. The U-HID lamp produces a beam of light due to the formation of a plasma discharge arc. Its tube is made of a sphere of transparent quartz

Quartz

Quartz is the second-most-abundant mineral in the Earth's continental crust, after feldspar. It is made up of a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall formula SiO2. There are many different varieties of quartz,...

 or ceramic filled with a special inactive high pressure gas. Through the plasma formation in its core, the atoms outside the chamber produce light. At the beginning of the plasma formation, a blue color at the tips of the inner glass insulation can be seen. This can be considered a characteristic of the technology.

U-HID lamp uses a high voltage

High voltage

The term high voltage characterizes electrical circuits in which the voltage used is the cause of particular safety concerns and insulation requirements...

 pulse discharge that does not dissipate the plasma produced. The brilliance of a U-HID lamp can reach 80% in four seconds under normal temperature conditions, and can start working at 100% instantly after a re-ignition. Comparatively, the intensity of light from a U-HID lamp is at least three times stronger than a metal halide

Halide

A halide is a binary compound, of which one part is a halogen atom and the other part is an element or radical that is less electronegative than the halogen, to make a fluoride, chloride, bromide, iodide, or astatide compound. Many salts are halides...

HID lamp in a color range of 4200K (cold light).