Notably, an increase of the reaction rate was observed for the pulsed irradiation from 𝑟 0 = 0.07 nmol s - 1 to 𝑟 0 = 0.09 nmol s -1 . At the same time, 𝜉 0 increased from 0.008 to 0.023. Increasing the electrical driving current from the standard value of 0.2 A to 0.4 A resulted in a similar time-averaged photon flux as for the unpulsed irradiation and an even faster initial reaction rate of 𝑟 0 = 0.15 nmol s -1 , representing a speed-up by a factor of more than 2. Compared to experiments with the standard electrical driving current of 0.2 A, the initial photonic efficiency decreased to 𝜉 0 = 0.018. The generally limited accessibility TiO2 particles seems to favor the recombination of charge carriers, which is decelerated by lowering the time-averaged photon flux since the number of separated charges is reduced, making recombination less likely. Increasing the electrical driving current of the LED to achieve the same time-averaged photon flux as for the unpulsed irradiation increases the probability of recombination again, leading to a higher probability of charge carrier recombination and thus a reduced photonic efficiency.