T-Diddy,
I have never used the illuminated reticle but I am not sure I see their use as the target is not illuminated, i.e. a dark/shadowy object in the distance will still be dark/shadowy though the reticle itself will be easier to see. The objective is what gathers light and the bigger the objective, the more light "gathered". This is why people like the 50mm objective over the 40 and 33/32 mm ones. In low light conditions, the 50 mm will gather more light making the target appear more distinct/clear than will the smaller objectives.