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1. A solar lighting module for garden lamps, detachably mounted onto a top end of a hollow lamp column of a garden lamp, comprising an upper casing detachably mounted onto the hollow lamp column, a top plate disposed on a top of the upper casing and having a front side for installing a solar panel and a back side opposite to the front side; a bottom plate combined with a bottom of the upper casing, an integrated circuit board (PCBA) fixed between the upper casing and the bottom plate, and at least one light emitting element and a battery installed on the integrated circuit board, characterized in that the solar panel has a bottom side stacked and fixed to the front side of the top plate, the bottom side of the solar panel has a plurality of conductive terminals, the top plate at the top of the upper casing is formed with a perforation configured to be corresponsive to each conductive terminal, and the integrated circuit board is provided with a conductive spring opposite to each perforation, and after each conductive spring upwardly passes through the corresponding perforation, the conductive spring elastically abuts the conductive terminal of the bottom side of the solar panel, such that the integrated circuit board and the solar panel are electrically coupled to each other; and light emitted from the light emitting element can be passed through the bottom plate and projected into the hollow lamp column, and then transmitted outside through the hollow lamp column.
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