成唯識論了義燈 7.84

7.84

Answer: If one presents both the grasper and the grasped, it could be a tatpuruṣa name. But here, what is obtained is designated with the name "obtaining"; therefore, it is not a tatpuruṣa compound. Or it may be that "obtaining" is the substance of inquiring, while "light" is the function of illumination; the substance can possess the function, and the light that is obtained is called "obtaining light." The samādhi of obtaining light is in both cases a tatpuruṣa compound or a bahuvrīhi/adjacent compound (upacāra): the samādhi is not itself the obtaining of light, but the samādhi possessing the obtaining of light is called the "samādhi of obtaining light."