Patent ID: 7585086

Claim:
A luminaire for at least one elongated gas-discharge lamp, the luminaire comprising: an enclosure comprised of a transparent lower part and a transparent upper part, wherein the lower part is adapted to be mounted in a fixed position; electrical gear arranged in the lower part; wherein the lower part and the upper part are assembled to a closed form thus providing a protection against sprayed or splashed water; wherein the lower part and the upper part consist of thermoplastic material and are made from same batches of the thermoplastic material; wherein the upper part and the lower part each have a circumferentially extending rim extending about an entire circumference of the upper and lower parts, respectively, wherein the rims overlap one another and a first one of the rims has a first sealing groove and a second one of the rims has a second sealing groove, wherein the first and second sealing grooves each extend about the entire circumference of the upper and lower parts, respectively, and together delimit an intervening space extending about the entire circumference of the upper and lower parts, respectively, and having a circular cross-section and wherein the enclosure further comprises a ring seal that is arranged in the intervening space of the first and second sealing grooves.