A light emitting device comprising: at least one LED light source (6, 61, 62) adapted for, in operation, emitting light source light, and an elongated light guide comprising a height direction, a width direction, a depth direction and a central longitudinal axis extending in the height direction, wherein the elongated light guide further comprises: a first major surface and a second major surface arranged extending opposite to the first major surface in the depth direction of the elongated light guide, a first minor surface and a second minor surface arranged extending opposite to the first minor surface in the width direction of the elongated light guide, and a first end and a second end arranged extending opposite to the first end in the height direction of the elongated light guide, wherein the elongated light guide further comprises at least one light in-coupling element (7, 71, 72) configured to couple the light source light into the elongated light guide and at least one light out-coupling element (81, 82) configured to couple the light source light out of the elongated light guide, the elongated light guide being configured to guide at least a portion of the light source light which is coupled into the light guide at the light in-coupling element via total internal reflection to the light out-coupling element, wherein the elongated light guide is twisted around the central longitudinal axis of the light guide, wherein the at least one light out-coupling element (81, 82) is elongated, characterized in that the at least one light in-coupling element forms part of or is provided as a structure arranged adjacent to the LED light source which is provided in the shape of a LED filament extending in the height direction of the light guide throughout a part or all of the light guide. at least one LED light source (6, 61, 62) adapted for, in operation, emitting light source light, and an elongated light guide comprising a height direction, a width direction, a depth direction and a central longitudinal axis extending in the height direction, wherein the elongated light guide further comprises: a first major surface and a second major surface arranged extending opposite to the first major surface in the depth direction of the elongated light guide, a first minor surface and a second minor surface arranged extending opposite to the first minor surface in the width direction of the elongated light guide, and a first end and a second end arranged extending opposite to the first end in the height direction of the elongated light guide, wherein the elongated light guide further comprises at least one light in-coupling element (7, 71, 72) configured to couple the light source light into the elongated light guide and at least one light out-coupling element (81, 82) configured to couple the light source light out of the elongated light guide, the elongated light guide being configured to guide at least a portion of the light source light which is coupled into the light guide at the light in-coupling element via total internal reflection to the light out-coupling element, wherein the elongated light guide is twisted around the central longitudinal axis of the light guide, wherein the at least one light out-coupling element (81, 82) is elongated, characterized in that the at least one light in-coupling element forms part of or is provided as a structure arranged adjacent to the LED light source which is provided in the shape of a LED filament extending in the height direction of the light guide throughout a part or all of the light guide. a first major surface and a second major surface arranged extending opposite to the first major surface in the depth direction of the elongated light guide, a first minor surface and a second minor surface arranged extending opposite to the first minor surface in the width direction of the elongated light guide, and a first end and a second end arranged extending opposite to the first end in the height direction of the elongated light guide, wherein the elongated light guide further comprises at least one light in-coupling element (7, 71, 72) configured to couple the light source light into the elongated light guide and at least one light out-coupling element (81, 82) configured to couple the light source light out of the elongated light guide, the elongated light guide being configured to guide at least a portion of the light source light which is coupled into the light guide at the light in-coupling element via total internal reflection to the light out-coupling element, wherein the elongated light guide is twisted around the central longitudinal axis of the light guide, wherein the at least one light out-coupling element (81, 82) is elongated, characterized in that the at least one light in-coupling element forms part of or is provided as a structure arranged adjacent to the LED light source which is provided in the shape of a LED filament extending in the height direction of the light guide throughout a part or all of the light guide.