Green‐light‐induced phototherapeutic applications of Ru complexes (e.g., TLD‐1433) are currently in clinical trial for bladder cancer,[142] but in general the light absorption properties of photoactivated Ru complexes should be optimised to better absorb red or near‐infrared light (600–900 nm), thus enabling more effective light tissue penetration and hence real therapeutic applications in humans. Here, HPS6 is linked to urinary bladder carcinoma.