Those lights will grow two small plants, they will work. The thing you might want to do is remove the ballast from those light and rewire it so there's some distance between the two, because in actual grow lights, the ballast and the hood are two seperate components, but what you have is an outdoor street light and the ballast is built into the top of the hood, which will creat a lot of heat, even two small ones like that, if you grow in a closet or cabinet.
They will work just fine if you modify them a bit.