Figure presents the influence of cavity detuning with the presence of the CW laser driving, λ D -induced transition to dark states, and cavity loss on PMET fitted rate constants for an uphill reaction with N = 1000. The ET and CW laser parameters are the same as those used in Fig. and Fig. . Simulations were performed for λ D = 0 (red), λ D = 20 meV (blue), and λ D = 50 meV (green) over t = 10 ns with collective coupling √ Ng c = 150 meV. Fig. shows the fitted forward rate constants from the propagated acceptor populations with a fixed Q = 100 and detuning ranging over δ c ∈ [-100, 500] meV. For positive detunings, the rate constant increases up until δ c ≈ 350 meV and begins to decrease for larger detunings. The rate constant is maximized near δ c ≈ 350 meV because the shoulder of the exponential in Eq. 28 is nearly 0 (∆Gλ D -(δ c + Ω R )/2 + λ A ≈ 0) for this detuning which can be considered a nearly barrier-less transfer from the UP to the acceptor states. While there is some rate reduction at positive detunings due to the decrease of UP matter character sin 2 Φ, this reduction is only sin 2 Φ(δ c = 350 meV)/ sin 2 Φ(δ c = 0 meV) ≈ 0.24 which is much less than the several orders of magnitude increase of rate due to the more favorable driving force around δ c ≈ 350 meV. The rate constant begins to decrease for detunings larger than δ c ≈ 350 meV due to both the further reduction of matter character and a driving force that is now in the inverted Marcus regime. For negative detunings, the rate constants decrease for all λ D which is expected based on Eq. 28 because the UP energy is decreased which makes the driving force larger and the reaction from the UP to the acceptors slower.