In visible light positioning system, the receiver needs to capture the visible light signals from different reference optical sources, and then the position coordinates of the receiver are estimated based on the position information of the reference light source and the preset visible light positioning algorithm. In the above positioning process, it is usually assumed that the light source is a Lambertian light source, that is, the light beam of the light source conforms to the Lambertian law. In order to achieve specific lighting effects, solid-state light source manufacturers often reshape the light beams by improving the subassembly process and adding secondary optical lenses to obtain diversified spatial light beams. In order to quantify the impact of actual non-Lambertian beams on the visible light positioning system, three commercial non-Lambertian beams, EdiPower Emitter, LUXEON Rebel, and Side Emitter are introduced into typical indoor scenes. The quantitative results show that, compared with the traditional Lambertian beam configuration, the maximum positioning error and the average positioning error introduced by the non-Lambertian beam are 101.7 cm and 48.8 cm, respectively. Taking into account the influence of the non-normalized radiation power of commercial non-Lambertian beams, the above positioning error will be further increased.