Lighting device based on solid-state lighting technology

A lighting device comprising:

• a substrate defining a plane;
• at least one solid-state light source mounted on the substrate, wherein the at least one solid-state light source is arranged to emit light along an optical axis substantially perpendicular to the plane;
• an outer light-transmissive envelope arranged to receive light emitted by the at least one solid-state light source;
• and
• a light-transmissive wall arranged at a circumference of the substrate and having an extension along the optical axis,
• wherein the light-transmissive wall is curved towards the optical axis and comprises an edge portion distal to the substrate, wherein the edge portion is adapted to diffuse light from the at least one solid-state light source such that a shadow on the outer light-transmissive envelope is blurred, and wherein the shadow is caused by an electrical component which is mounted on the substrate and blocks light emitted by the at least one solid-state light source, and, wherein the edge portion comprises a serration.