A plant cultivation lamp set comprises a lamp seat having a light source, a cultivation base provided with at least one cultivation region, a support frame disposed between the lamp seat and cultivation base, a power supply device installed on one side of the cultivation base, and an expansion module having a first terminal and a second terminal corresponding to the first terminal. In the disclosed plant cultivation lamp, the first and second terminals of the expansion module are respectively disposed on two opposite ends of the power supply device, and the first and second terminals of the expansion modules of the plant cultivation lamps are mutually electrically connected, so that each plant cultivation lamp can be expandable in the horizontal direction or perpendicular/horizontal directions. Accordingly, cultivators themselves can complete serial connection of plant cultivation lamps in accordance with cultivation requirements, thus to increase cultivation space.本發明植物培養燈具包含燈座、培育基座、支架、供電裝置以及擴接模組,其中,燈座具有燈源,培育基座設有至少一培育區域,支架設置於燈座與培育基座之間,供電裝置安裝於上述培育基座一側,擴接模組具有一第一端子以及一對應上述第一端子的第二端子。本發明將第一端子與第二端子分別設於上述供電裝置的相反兩端側,並透過每個植物培養燈具之間的第一端子與第二端子相互電性連接,使每個植物培養燈具之間以水平或以垂直水平方向進行擴接,讓培植者可依據培育需求自行串接燈具,藉以增加培育空間。1‧‧‧植物培養燈具10‧‧‧燈座11‧‧‧燈源20‧‧‧培育基座21‧‧‧下殼22‧‧‧上蓋221‧‧‧培育區域224‧‧‧蓋體225‧‧‧第一開孔30‧‧‧支架31‧‧‧第一桿件32‧‧‧第二桿件50‧‧‧擴接模組51‧‧‧第一端子52‧‧‧第二端子
