The spell Green-Flame Blade has a casting time of one action and is also a cantrip. Therefore it seems like a sorcerer should be able to cast it as their action and (by using Quickening) their bonus action. However, Green-Flame Blade allows/requires the caster to make a weapon attack, which would mean that the caster would get to make an additional weapon attack.
The question is then: Is a Sorcerer allowed to make two attacks with the same weapon (as described above)? or does the caster need to be dual-wielding?
if the Sorcerer is able to make the two attacks with one weapon does it need to have the light property?