Abstract
The ceramic metal halide lamps which life characteristic was improved drastically in the metal halide lamps were sold in 2000. Then, we developed this new lamps 150〜360W which were improved with the lamp life and efficiency by reconsidering the basic design of the former lamps recently. The new lamps consist of horizontal types and vertical types in and two color temperatures of 4000K and 3000K. The most suitable kind of lamps can be used from many models.
