Meanwhile, we also succeeded in upgrading the design of the emitters with a high-power UVA-LED (Luminus SST-10-UV-A130-E365-00) with a rated radiant power of up to 720 mW each. As shown in Figure , this configuration achieves a vastly improved performance with photon flux densities of up to 286.4 µM s -1 (93.9 W L -1 radiant power density), almost 8 times the value of the initial prototype. This value was achieved at a fill factor of 33 %, whereas using a higher number of emitters resulted in reduced photon flux. This suggests that in this case, the power output of the amplifier or the induction coils can no longer keep up with the high number of emitters and thus presents a limiting factor. While in this case, the output of each individual emitter was determined at 290.4 nM s -1 photon flux or 95.2 mW radiant power, this was still only 13.2 % of the LED's theoretical output, hinting at additional potential through further optimization of the magnetic field density. An analysis of the photon flux density in dependence of the fill factor and applied voltage on the induction coils (Figure ) hints at further potential if a higher voltage can be achieved. Nonetheless, wall-plug efficiencies reached significantly higher values of up to 8.0% in this case (Table ). Further optimization of the induction coils and amplifier then led to the third and final prototype (EAP-T0). The EAP-T0 offers the same nominal electrical power of 320 W but compared to the EAP-01, the matching of the induction coils to the amplifier has been optimized, so that an induction current of up to 5 A can be reached compared to approx. 1.9 A which can be driven by the EAP-01.