Optogenetic tools for gene expression control in Synechococcus sp. PCC 7002 were studied, focusing on YF1/FixJ and CcaS/CcaR systems. CcaS/CcaR, from Synechocystis sp. PCC 6803, showed effective light-responsive performance, while YF1/FixJ had limited success. Genetic modifications enhanced CcaS/CcaR activity, highlighting challenges in transferring optogenetic tools across species.