High pressure lamp with specific mercury filling and bromine

摘要

The mercury high pressure lamp is designed for DC operation and takes a power (P) between 150 and 250 W. The specific Hg amount is less than 0.20 mg/mm<3>, and the bromine content amounts to between 10<-4> and 10<-3> micromol/mm<3>. The discharge vessel encloses an ellipsoidally shaped discharge volume with a small half axis (a) and a large Half axis (b). The eccentricity e = b/a, lying between 1.0 and 1.8.