A light generating device comprising an LED filament, wherein the LED filament comprises a support, a set of solid state light sources, and an encapsulant, wherein: - the LED filament has a length axis having a first length; - the support supports a 1D array of solid state light sources at one side of the support; - the solid state light sources are arranged over the first length of the LED filament on the support, wherein the solid state light sources are configured to generate light source light; - the encapsulant encloses at least part of each of the solid state light sources of the set of solid state light sources, wherein the encapsulant comprises a luminescent material configured to convert at least part of the light source light into luminescent material light; - the light generating device is configured to generate device light comprising one or more of (i) the light source light and (ii) the luminescent material light; - for each of the solid state light sources of the set of solid state light sources applies that relative to a first virtual plane parallel to the length axis and intersecting with the solid state light sources the encapsulant is asymmetrically configured relative to the first virtual plane; and - the light generating device is configured to generate white device light, and wherein for a plurality of the solid state light sources applies that device light emanating away from the solid state light sources in a third virtual plane perpendicular to the first virtual plane and perpendicular to the support in different directions has different correlated color temperatures, wherein a distribution of the correlated color temperatures is not symmetrical relative to the first virtual plane, and wherein - a lower correlated color temperature T L is at maximum 2500 K and a higher correlated color temperature T H is at least 2300 K, wherein T L < T H, and wherein a difference between the higher correlated color temperature T H and the lower correlated color temperature T L is at least 300 K. - the LED filament has a length axis having a first length; - the support supports a 1D array of solid state light sources at one side of the support; - the solid state light sources are arranged over the first length of the LED filament on the support, wherein the solid state light sources are configured to generate light source light; - the encapsulant encloses at least part of each of the solid state light sources of the set of solid state light sources, wherein the encapsulant comprises a luminescent material configured to convert at least part of the light source light into luminescent material light; - the light generating device is configured to generate device light comprising one or more of (i) the light source light and (ii) the luminescent material light; - for each of the solid state light sources of the set of solid state light sources applies that relative to a first virtual plane parallel to the length axis and intersecting with the solid state light sources the encapsulant is asymmetrically configured relative to the first virtual plane; and - the light generating device is configured to generate white device light, and wherein for a plurality of the solid state light sources applies that device light emanating away from the solid state light sources in a third virtual plane perpendicular to the first virtual plane and perpendicular to the support in different directions has different correlated color temperatures, wherein a distribution of the correlated color temperatures is not symmetrical relative to the first virtual plane, and wherein - a lower correlated color temperature T L is at maximum 2500 K and a higher correlated color temperature T H is at least 2300 K, wherein T L < T H, and