electron excitation in "electride solutions"

[mississippichem]

Adding alkali metals to anhydrous ammonia produces what basically amounts to a solution of alkali metal cation (I) and a solvated electron. These solutions are often and unofficially reffered to as "electride" solutions. My question is: what happens to the solvated electron upon photo-excitation? For example, what kind of UV-vis or EPR spectrum might arise from characterization of this solution. The physics of these solutions are poorly understood at best as far as I know, (correct me if I'm misinformed). On a side note, these solutions undergo interesting color shifts as concentration changes. The completely saturated solution takes on a golden metallic luster for the sodium analogue, I smell lack of a conductive band gap!?