Semiconductor lamp having two groups of LEDs corresponding to upper and lower sides of a reflector

A semiconductor lamp, comprising

• a reflector having a lower side and an upper side, wherein the lower side widens laterally and wherein the lower side and the upper side are separated from one another by an upper rim, and having
• a first light source group having at least one semiconductor light source and a second light source group having at least one semiconductor light source,
• wherein the reflector is provided as a cooling body for the first light source group and for the second light source group;
• wherein at least a part of a light that can be emitted by the first light source group can be reflected by means of the lower side of the reflector at least into a spatial angle range that cannot be directly illuminated by the first light source group,
• wherein the second light source group is configured for the purpose of illuminating at least in part via reflection from the upper side of the reflector at least one shaded region of the reflector in relation to the first light source group, and at least one shaded region of the reflector in relation to the first light source group, and
• wherein the upper rim of the reflector is designed as a cooling surface, wherein the semiconductor lamp has a two-part light-transmissive bulb having a first bulb part and a second bulb part, wherein the first bulb part covers the first light source group and the second bulb part covers the second light source group, and the first bulb part and the second bulb part are separated from one another by the upper rim of the reflector.