with the initial reaction rate 𝑟 0 and the incident photon flux 𝑞 0 . A duty cycle of 50 % with 1000 ms irradiation and 1000 ms dark time was used, leading to a time-averaged reduction of the incident photon flux to 50 %. Thus, a reduced initial reaction rate can be expected when operating in the photonlimited regime, as it is the case for the studied reaction.