Studies of the effect of the preactivation time showed a similar behavior as previously described, i.e. an increasing activity with increasing activation time. Following up on previous studies on the effect of pulsed irradiation on the photocatalytic reaction, pulsed irradiation was also studied. The grid insert with a loading of 𝜔 𝑇𝑖𝑂2 = 0.05 was tested as the insert with the lowest performance under steady irradiation, thus offering the largest potential for improvement. In addition to the initial reaction rate, the evaluation of the experimental data must consider the changed irradiation conditions. This can be realized by calculating the initial photonic efficiency, defined as: