This invention is a fluorescent power lamp with diffusion plate for agricultural application, which comprises a light box a light source section a tray, which is arranged in the light box and mounted to an inner wall, the tray being provided with multiple concave receiving pockets corresponding to the light source section, florescent powder being freely filled into each receiving pocket and a diffusion plate, which is arranged in the light box. The diffusion plate is provided, on a side thereof corresponding to the tray, with a plurality of arc concave strips arranged parallel to each other. Each concave strip is formed by multiple concave grooves arranged parallel and connected to each other. The light source section irradiates the tray with light, allowing the light to transmit through the florescent powder and the receiving pockets having no florescent powder to irradiate the diffusion plate. Different wave lengths of light are generated with light transmitting through florescent powder of different ratios. Light of different wavelengths, after transmitting through the arrangement of the concave grooves of the concave strips of the diffusion plate, is changed through transmission, refraction, and absorption.本發明一種用於農業照明之螢光粉擴散片燈具,其包括:一燈殼;一燈源部;一盤體,其裝設於燈殼內並卡設於內壁面,該盤體對應燈源部係凹設有複數容槽,另設有複數螢光粉自由充填入各容槽內;及一擴散片,其裝設於燈殼內,而該擴散片對應盤體的一側係凹設有複數並排連接之弧凹條,又各弧凹條係由複數弧凹槽相互並排連接所形成;該燈源部以光線朝盤體照射,並以光線透射各螢光粉以及未填設有螢光粉的容槽後朝擴散片照射,光線經由各螢光粉比例的不同而產生不同的光線波長,不同的光線波長在經由擴散片的各弧凹條之各弧凹槽的設置,使光線以透射、折射及吸收的型態予以變化。(1)‧‧‧燈殼(2)‧‧‧燈源部(3)‧‧‧盤體(31)‧‧‧容槽(4)‧‧‧螢光粉(5)‧‧‧擴散片(51)‧‧‧弧凹條(511)‧‧‧弧凹槽
