Getting the schematic is easy. Getting the housing parts and guts quantity one will not compete with $2 at the store.
Thanks for not using upper case text.
Is this a school/college project?
Old solar garden lights used an LDR but they got sunburned after 2 years outside. New solar garden lights use the glass-covered solar panel to detect light and dark. Old solar panels with a plastic cover also got sunburned and failed after a couple of years.