Led filament

A light-emitting diode, LED, filament configured to provide LED filament light and comprising:

• an at least partially light-transmissive elongated carrier, wherein said elongated carrier comprises two elongated edge portions arranged at a distance (D) from each other, a first major surface, and a second major surface arranged opposite to said first major surface, said first and second major surfaces being delimited by said edge portions;
• a plurality of first LEDs distributed along said elongated carrier on said first major surface of said elongated carrier, the plurality of first LEDs being configured to emit first LED light;
• a first elongated translucent layer encapsulating said plurality of first LEDs and at least partially covering said first major surface of said elongated carrier, wherein said first elongated translucent layer comprises a first luminescent material, and wherein said first luminescent material is arranged to at least partly convert said first LED light into first converted light;
• an elongated reflective layer arranged to at least partially cover said first elongated translucent layer, such that at least part of said first converted light is transmitted through said at least partially light-transmissive elongated carrier;
• and
• a plurality of second LEDs distributed along said elongated carrier on said second major surface of said elongated carrier, the plurality of second LEDs being configured to emit second LED light, wherein said plurality of second LEDs comprises a plurality of blue LEDs adapted to emit blue light, a plurality of green LEDs adapted to emit green light, and a plurality of red LEDs adapted to emit red light;
• wherein said second major surface of said elongated carrier is free from an encapsulant or comprises an encapsulant being free from a luminescent material, the LED filament further comprising,
• a plurality of third LEDs distributed along said elongated carrier on said first major surface of said elongated carrier, the plurality of third LEDs being configured to emit third LED light;
• and
• a second elongated translucent layer encapsulating said plurality of third LEDs and at least partially covering said first major surface of said elongated carrier, wherein said second elongated translucent layer comprises a second luminescent material, wherein said second luminescent material is arranged to at least partly convert said third LED light into second converted light, and wherein said first converted light has a first spectral light distribution and said second converted light has a second spectral light distribution different from said first spectral light distribution,
• wherein said elongated reflective layer is arranged to at least partially encapsulate or cover said second elongated translucent layer, such that at least part of said second converted light is transmitted through said at least partially light-transmissive elongated carrier,
• wherein said elongated reflective layer is arranged between said first elongated translucent layer and said second elongated translucent layer and,
• wherein said first elongated translucent layer is fully separated from said second elongated translucent layer by said elongated reflective layer.