A kind of plant culture lighting system builds the plant that one kind of what is planted plural plant and plants, which includes an illumination module and a ring-like transformation mould group. The illumination module includes plural luminescence unit and an electrically connected port. Each luminescence unit has light-emitting diode of the plural energization Hou to those plant throw lights. The ring-like transformation mould group includes an annular core, the primary coil on the winding what annular core and the secondary coil on the winding what annular core. Accordingly, this creation is provided to illuminate without harmonious wave power to each luminescence unit and be used with single annular transformation mould group, solves the problems, such as that energy consumption and poor heat radiation caused by an electronic type rectifier need to be respectively set to each luminescence unit by commonly using structure.一種植物栽培照明系統，建置於一種植複數植物的植栽上，該植物栽培照明系統包含一照明模組以及一環型變壓模組。該照明模組包含複數發光單元以及一電力連接埠。每一該發光單元具有複數通電後向該些植物投射光線的發光二極體。該環型變壓模組包含一環形鐵芯、一繞設於該環形鐵芯上的初級線圈以及一繞設於該環形鐵芯上的次級線圈。據此，本創作以單一環形變壓模組提供無諧波電力給每一該發光單元照明使用，解決了習用結構需對每一該發光單元分別設置一電子式整流器所造成的耗能及散熱不佳的問題。
