A reflector component is provided for a light emitting diode (LED) lamp that includes a plurality of spaced-apart LED light sources. The reflector component includes a bottom wall having two side edges extending along a longitudinal direction. The bottom wall is formed with a plurality of spaced-apart through holes, each of which permits a respective one of the LED light sources to extend therethrough. The reflector component further includes two side walls extending respectively and upwardly from and along the two side edges of the bottom wall. Each of the side walls has a reflecting surface that faces toward the other of the side walls and that extends upwardly and inclinedly relative to the bottom wall such that a distance between the reflecting surfaces increases in a direction away from the bottom wall.