how many full days of sunlight would it take to power one solar powered street light?

i just wanna know

Unfortunately, what you are proposing is very expensive. Here is a whole kit for a solar powered street light, http://www.altestore.com/store/Lighting-Fans/Outdoor-Lighting/SUNWIZE-Solar-Panels-Component-DLS-240-115-55-Low-Press-Sodium-Lighting/p1693/. Each one costs almost $4000.