Even if this just becomes chemotherapy but locally activated by near-infrared light, that would be great. It means, at worst, don't go outside or be in bright

Even if this just becomes chemotherapy but locally activated by near-infrared light, that would be great. It means, at worst, don't go outside or be in bright sun-lit spaces, but also, we can shine a flashlight on where the cancer is to kill it. Even if it weren't very selective (which could be adjusted with other targeting molecules), light-trigged theraputics are easy to understand the propagation of.