A light emitting device configured to tunably emit light with a total color temperature (CT tot), said light emitting device comprising: - an elongated carrier having a first major surface and a second major surface opposite to said first major surface, - a first light source, being a first plurality of LEDs arranged on said first major surface of the carrier, and arranged to emit a first light with a first color temperature (CT 1), said first color temperature tunably adjustable within a first color temperature range from a first low color temperature (CT 1 low) to a first high color temperature (CT 1 high), having a range span r1 = |CT 1 low - CT 1 high |, and with a first luminous flux F 1, - a second light source, being a second plurality of LEDs arranged on said second major surface of the carrier, and arranged to emit a second light with a second color temperature (CT 2), said second color temperature tunably adjustable within a second color temperature range from a second high color temperature (CT 2 high) to second low color temperature (CT 2 low), having a range span r2 = |CT 2 low - CT 2 high |, and with a second luminous flux F 2, said light emitting device characterised by further comprising - at least one light emitting diode filament comprising said elongated carrier, and - a controller configured to individually control the first and second light sources so to tunably adjust said first and second color temperatures from a first state to a second state according to a preselected scheme, by increasing the first color temperature from CT 1 low in said first state to CT 1 high in said second state, and by decreasing the second color temperature from CT 2 high in said first state to CT 2 low in said second state, said controller is further configured to control the first and second luminous fluxes F 1 and F 2, such that the change in F 1 is larger than the change in F 2 if r1<r2 and visa versa, such that the total color temperature of the light emitting device remains invariant at a constant value in said first and second states, preferably the first color temperature and the second color temperature differ less than 300 K. - an elongated carrier having a first major surface and a second major surface opposite to said first major surface, - a first light source, being a first plurality of LEDs arranged on said first major surface of the carrier, and arranged to emit a first light with a first color temperature (CT 1), said first color temperature tunably adjustable within a first color temperature range from a first low color temperature (CT 1 low) to a first high color temperature (CT 1 high), having a range span r1 = |CT 1 low - CT 1 high |, and with a first luminous flux F 1, - a second light source, being a second plurality of LEDs arranged on said second major surface of the carrier, and arranged to emit a second light with a second color temperature (CT 2), said second color temperature tunably adjustable within a second color temperature range from a second high color temperature (CT 2 high) to second low color temperature (CT 2 low), having a range span r2 = |CT 2 low - CT 2 high |, and with a second luminous flux F 2, - at least one light emitting diode filament comprising said elongated carrier, and - a controller configured to individually control the first and second light sources so to tunably adjust said first and second color temperatures from a first state to a second state according to a preselected scheme, by increasing the first color temperature from CT 1 low in said first state to CT 1 high in said second state, and by decreasing the second color temperature from CT 2 high in said first state to CT 2 low in said second state, said controller is further configured to control the first and second luminous fluxes F 1 and F 2, such that the change in F 1 is larger than the change in F 2 if r1<r2 and visa versa, such that the total color temperature of the light emitting device remains invariant at a constant value in said first and second states, preferably the first color temperature and the second color temperature differ less than 300 K. by increasing the first color temperature from CT 1 low in said first state to CT 1 high in said second state, and by decreasing the second color temperature from CT 2 high in said first state to CT 2 low in said second state, said controller is further configured to control the first and second luminous fluxes F 1 and F 2, such that the change in F 1 is larger than the change in F 2 if r1<r2 and visa versa, such that the total color temperature of the light emitting device remains invariant at a constant value in said first and second states, preferably the first color temperature and the second color temperature differ less than 300 K.