A lighting device (5) is disclosed. The lighting device (5) comprises a plurality of light-emitting filaments (10), wherein each of the light-emitting filaments (10) comprises a plurality of solid-state light sources mounted on a carrier along a longitudinal axis of the light-emitting filament (10). The light-emitting filaments (10) are arranged in a planar configuration, and the lighting device (5) has a main direction of illumination (I) perpendicularly away from a plane (P) defined by the planar configuration. The longitudinal axes (L1, L2) of at least two light-emitting filaments (10) are non-parallel to each other. A luminaire comprising the lighting device is also disclosed. The lighting device (5) can be produced in a cost-efficient manner.