Gas-discharge lamp

Abstract

The invention describes a gas-discharge lamp () comprising a vessel (), which vessel () is partially coated with at least one longitudinal stripe (S, S') arranged on the surface of the vessel () below a horizontal plane (P) through a longitudinal axis (X) through the centre of the lamp () such that, on each side of the lamp, an angle (β, β) subtended at the lamp centre by the horizontal plane (P) and an upper edge () of the longitudinal stripe (S, S′) on that side of the lamp comprises at least 10°, more preferably at least 13°, most preferably at least 15°. The invention also describes a reflector () for a lamp (), comprising a reflective interior surface realized to deflect light (L, L, L, L) originating from the lamp () outward to give a specific beam profile () with a bright/dark cut-off line () and a shoulder (), and wherein the lamp (), in particular a lamp () according to any of claimsto, is positioned horizontally in the reflector (), and wherein the reflective interior surface comprises at least one beam-shaping region (A,B) realised to deflect a portion (L, L) of the light (L, L, L, L), emitted from the lamp () between 7.5° and 15° below a horizontal plane (P), at a specific region (A,B) within the beam profile (). The invention further describes a lighting assembly () comprising such a reflector () and a lamp (), in particular a lamp () according to the invention.