Figure 8.

The CLS for X = 2 (red) and 16 (blue) within the same approximations as in Figure 5. The solid line and filled circles represent the full calculation as shown in Figure 7, the CLS without lifetime effects is given by the dashed lines and triangles, and the dotted line and diamonds and dotted-dashed line and squares represent the CLS within the cumulant and Condon approximations, respectively. As in Figure 7, the lines through the data points are tri-exponential fits and are only meant to guide the eye.