should sort like `LightDependent.epsilon()` so that if the user manipulates the spectrum they can still plot it [all_lambdas](https://github.com/siplab-gt/cleo/blob/8db8e5fa65139e22fc2232cb786966903f044da2/cleo/light/light_dependence.py#L199) [lam_eps_array](https://github.com/siplab-gt/cleo/blob/8db8e5fa65139e22fc2232cb786966903f044da2/cleo/light/light_dependence.py#L126)