A light emitting module (100, 150, 300, 350) for emitting light through a light exit window (104, 402) of the light emitting module (100, 150, 300, 350), the light emitting module (100, 150, 300, 350) comprising: - a base (110, 309, 358) comprising a light reflective surface (112, 306, 354) facing the light exit window(104, 402), the light reflective surface (112, 306, 354) having a base reflection coefficient Rbase being defined by a ratio between the amount of light that is reflected by the light reflective surface (112, 306, 354) of the base and the amount of light that impinges on the light reflective surface (112, 306, 354) of the base, - at least one solid state light emitter (108, 154, 156, 312, 360) provided on the base (110, 309, 358) and being configured for emitting light of a first color range, the at least one solid state light emitter (108, 154, 156, 312, 360) comprising a top surface (106, 152, 158, 412) and having a solid state light emitter reflection coefficient R_SSL being defined by a ratio between the amount of light that is reflected by the at least one solid state light emitter (108, 154, 156, 312, 360) and the amount of light that impinges on the top surface (106, 152, 158, 412) of the at least one solid state light emitter (108, 154, 156, 312, 360), wherein the top surface (106, 152, 158, 412) of the at least one solid state light emitter (108, 154, 156, 312, 360) faces towards the light exit window (104, 402), - a partially diffusive reflective layer (102, 308, 352), the light exit window (104, 402) comprising at least a part of the partially diffusive reflective layer (102, 308, 352), and wherein a distance (h, h1, h2) is present between the top surface (106, 152, 158, 412) of the at least one solid state light emitter (108, 154, 156, 312, 360) and the partially diffusive reflective layer (102, 308, 352), and - a side wall (314, 362, 404) between the base (110, 309, 358) and the light exit window (104, 402), the base (110, 309, 358), the side wall (314, 362, 404) and the light exit window (104, 402) enclosing a cavity, the side wall (314, 362, 404) comprising a light reflective wall surface (304, 406) facing towards the cavity, the light reflective wall surface (304, 406) having a wall reflection coefficient Rwall being defined by a ratio between the amount of light that is reflected by the light reflective wall surface (304, 406) and the amount of light that impinges on the light reflective wall surface (304, 406), wherein a solid state light emitter area ratio ρ SSL is defined as the ratio between the area of the top surface of the at least one solid state light emitter and the sum of the area of reflective surface of the base and the area of the reflective surface of the wall (304, 406), wherein the value of an effective reflection coefficient Reff is larger than the solid state light emitter reflection coefficient R_SSL plus a factor c times the difference between 1 and the solid state light emitter reflection coefficient R_SSL, and wherein 0.4 ≤ c ≤ 1 and ρ SSL > 0.25, the effective reflection coefficient Reff being a weighted average of the base reflection coefficient Rbase and the wall reflection coefficient Rwall weighted corresponding to the sizes of the respective surface areas. - a base (110, 309, 358) comprising a light reflective surface (112, 306, 354) facing the light exit window(104, 402), the light reflective surface (112, 306, 354) having a base reflection coefficient Rbase being defined by a ratio between the amount of light that is reflected by the light reflective surface (112, 306, 354) of the base and the amount of light that impinges on the light reflective surface (112, 306, 354) of the base, - at least one solid state light emitter (108, 154, 156, 312, 360) provided on the base (110, 309, 358) and being configured for emitting light of a first color range, the at least one solid state light emitter (108, 154, 156, 312, 360) comprising a top surface (106, 152, 158, 412) and having a solid state light emitter reflection coefficient R_SSL being defined by a ratio between the amount of light that is reflected by the at least one solid state light emitter (108, 154, 156, 312, 360) and the amount of light that impinges on the top surface (106, 152, 158, 412) of the at least one solid state light emitter (108, 154, 156, 312, 360), wherein the top surface (106, 152, 158, 412) of the at least one solid state light emitter (108, 154, 156, 312, 360) faces towards the light exit window (104, 402), - a partially diffusive reflective layer (102, 308, 352), the light exit window (104, 402) comprising at least a part of the partially diffusive reflective layer (102, 308, 352), and wherein a distance (h, h1, h2) is present between the top surface (106, 152, 158, 412) of the at least one solid state light emitter (108, 154, 156, 312, 360) and the partially diffusive reflective layer (102, 308, 352), and - a side wall (314, 362, 404) between the base (110, 309, 358) and the light exit window (104, 402), the base (110, 309, 358), the side wall (314, 362, 404) and the light exit window (104, 402) enclosing a cavity, the side wall (314, 362, 404) comprising a light reflective wall surface (304, 406) facing towards the cavity, the light reflective wall surface (304, 406) having a wall reflection coefficient Rwall being defined by a ratio between the amount of light that is reflected by the light reflective wall surface (304, 406) and the amount of light that impinges on the light reflective wall surface (304, 406),