Patent ID: 7701140

Claim:
A high-pressure discharge lamp comprising: an outer envelope in which a discharge vessel is arranged around a longitudinal axis, the discharge vessel enclosing, in a gastight manner, a discharge space provided with an ionizable filling, the discharge vessel having a first and a second mutually opposed neck-shaped portion through which a first and a second current-supply conductor, respectively, extend to a pair of electrodes arranged in the discharge space, the outer envelope having a bulb-shaped portion adjacent the discharge space, the bulb-shaped portion having a wall thickness d 1 , the remainder of the outer envelope having a wall thickness d 2 , and a ratio of d 1 and d 2 is in a range of: 0.35 ≤ ⅆ 1 ⅆ 2 ≤ 0.6 ⁢ ⁢ or ⁢ ⁢ 1.0 ≤ ⅆ 1 ⅆ 2 ≤ 1.5 wherein the high-pressure discharge lamp does not comprise a shield for containing a burst of the discharge vessel.