If you want to get your budgie(s) identified, you can always post some pics in the Budgie Breeding \\ Mutation and genetics section, there are users who are more that happy to help you out with age, gender, and mutation names!
Budgies can see UV light and the mask looks like it is glowing. The cheek patches are even brighter and stand out like markers on each side of the face. I imagine this is used for pair selection, and maybe for locating the beak when feeding? I believe budgies tend to choose those with brighter UV given the choice.