Visible light promoted photocatalytic water oxidations for potential solar fuel production have been studied widely, with many reports on optimization of reagent components. Here we report an exploration on the effects upon ongoing reactions of daylight equivalent light intensity illumination with regulated short dark periods of a few seconds duration as compared to standard continuous illumination. 

In addition raw XRD data of metal oxide catalysts used, an additional image of reaction flask and a movie file that shows a reaction flask under under cycling RGB LED illumination is given here.