The utilization of photons as green, sustainable and cost-free reagents to drive chemical transformations with the visible-light-excited photoredox catalysts has experienced a great deal of progress over the last decades . Consequently, a dizzying array of photochemical test benches have been introduced by different research groups, yet no clear standardization is disclosed. Despite the rapid development of photocatalysis, this achievement faces some problems of reproducibility and inconsistency of results because of the use of the traceless reagent "photon" as a reaction reagent. The discrepancies are often a result of missing detailed descriptions with respect to the photoreactor setup. Important information such as light intensity is not clearly stated and generally absent in the literature, but vaguely provides macroscopic indicators of irradiated powers and distances from the light source . To address the abovementioned issues, a standardized batch photoreactor with the following features is imperatively needed as partially recommended by Schiel et al. and Bonfield et al. 1. Fixed vial and Lamp (or LED) position: a given distance between the light sources and the reaction containers (vials, test tubes, etc.) provides a constant light intensity.