While these dynamics in Fig. and Fig. involve multiple non-ET pathways due to cavity loss and laser driving, the fitted acceptor populations (dashed lines, based on the right-hand side of Eq. 29) still show excellent agreement with the propagated populations. This demonstrates that the combined effect of cavity loss and CW laser driving to the UP can be accurately captured by fitting effective forward k f and backward k b rate constants to the acceptor population dynamics. These effective rate constants will change based on the cavity loss Γ and laser pumping V l even though the bare rate constants (such as Eq. 28) between the UP and the acceptor states are unchanged by Γ and V l .