A luminaire or lamp (10) with an umbrella-like lamp body (16), wherein the lamp (10) has at least one lighting element (20) integrated into the lamp body (16), which in the position of use emits light at least in one downward direction. The lamp body (16) has on its underside a conical stem-like element (28), which is used to fixate the lamp (10) above the neck opening (14) of a commercially available bottle (12) is formed, the light source being arranged in a ring or wreath shape around the stem-like element and preferably above it. The lamp (10) may be easily be fixed for example in standard wine or spirit bottles and provides glare-free and effective lighting for both the bottle itself and the surrounding area.