A light source, comprising a first light emitting source, a second light emitting source, and a light combining device for combining lights from the first light emitting source and the second light emitting source as an output light along in a first light path, wherein: the light combining device comprises a light guiding part for guiding a light from the second light emitting source into the first light path; the light guiding part also preventing a part of a light from the first light emitting source from entering the first light path, and a luminous flux of the prevented part of light is less than a luminous flux of the light from the first light emitting source that enters the first light path through the light combining device wherein the light combining device comprises a curved reflecting cup and at least one through hole or light transmitting hole formed on the reflecting cup, wherein the light from the first light emitting source is incident onto the reflecting cup from a first side and reflected by a part of other than the through hole or the light transmitting hole to enter the first light path; wherein the light guiding part comprises the through hole or light transmitting hole, wherein a part of light from the first light emitting source is prevented from entering the first light path by passing through the through hole or transmitting hole, and wherein the light from the second light emitting source is incident into the through hole or transmitting hole from a second side of the reflecting cup and enters the first light path wherein after passing through the through hole or light transmitting hole, the light of the second light emitting source is incident onto a light emitting surface of the first light emitting source and scattered by it to enter the first light path, wherein the light source further comprises a light collection part, wherein the reflecting cup is semi-sphere shaped, and the light emitting surface of the first light emitting source and the entrance of the light collection part are respectively located on two symmetrical points with respect to the spherical center of the reflecting cup. the light combining device comprises a light guiding part for guiding a light from the second light emitting source into the first light path; the light guiding part also preventing a part of a light from the first light emitting source from entering the first light path, and a luminous flux of the prevented part of light is less than a luminous flux of the light from the first light emitting source that enters the first light path through the light combining device wherein the light combining device comprises a curved reflecting cup and at least one through hole or light transmitting hole formed on the reflecting cup, wherein the light from the first light emitting source is incident onto the reflecting cup from a first side and reflected by a part of other than the through hole or the light transmitting hole to enter the first light path; wherein the light guiding part comprises the through hole or light transmitting hole, wherein a part of light from the first light emitting source is prevented from entering the first light path by passing through the through hole or transmitting hole, and wherein the light from the second light emitting source is incident into the through hole or transmitting hole from a second side of the reflecting cup and enters the first light path wherein after passing through the through hole or light transmitting hole, the light of the second light emitting source is incident onto a light emitting surface of the first light emitting source and scattered by it to enter the first light path, wherein the light source further comprises a light collection part, wherein the reflecting cup is semi-sphere shaped, and the light emitting surface of the first light emitting source and the entrance of the light collection part are respectively located on two symmetrical points with respect to the spherical center of the reflecting cup.