An automotive lamp including a sealed envelope having a filament or other light emitting element contained therein, with the envelope being formed from a barium-silicate based glass that is essentially free of cadmium and that includes barium oxide in the range of 2.15%-2.25% by weight, strontium oxide in the range of 5.58%-5.82% by weight, potassium oxide in the range of 8.9%-9.3% by weight, and molybdenum oxide in the range of 0.068%-0.072% by weight. Specific amounts of other constituent components of the glass are also disclosed. The resulting lamp provides an amber color that meets applicable CIE chromaticity requirements for automotive lamps and the glass exhibits physical characteristics that are closely matched to that of lime glass, making it suitable for standard lamp manufacturing processes.