glimmer  - luz trémula, luz tenue, rayo, vislumbre 

gleam  - luz (oscura), destello, rayo, vislumbre 

to discern  - discernir, distinguir, percibir 

to make out  - arreglárselas, hacer (un cheque), (argot, figurado) besuquear, liarse, distinguir, divisar, comprender, entender 

to begin to see

to have an inkling of