タイトルまたは説明

By using quality silex tube and filling with refrigerated xenon gas, which is refregirated by liquid nitrogen, the tube will not burst because of bleb or hydrosphere. The bulb would be much more effective, that the luminous efficiency can be up to *8 cm/w, and the color temperature can be ***0K or above. Color rendering index Ra is more the *5,which means the light is similar to sun light. The average life is *0% longer than ordinary halogen bulb.