A ceramic metal halide lamp wherein the halide dose includes the following
component ranges in mol/cm.sup.3: Nal: 1.84.times.10-5 to
2.33.times.10-5, Lnl3: 5.20.times.10-6 to 6.60.times.10-6, Tl:
1.76.times.10-7 to 2.23.times.10-7, wherein Ln are lanthanide elements,
and further includes a halide dosage weight of between 0.40 to 0.77.