| 摘要 |
A reflective cover is provided to guide a scattered beam toward a ground or a target area for improving an optical efficiency by using an outer wing of the reflective cover. A lighting device includes a lighting lamp(1), a first reflective surface(2), a second reflective surface(3), and an angle adjusting unit. The first reflective surface guides a scattered beam toward crops or a target area. The first reflective surface guides the scattered beam toward the second reflective surface. The second reflective surface guides the reflected beam from the first reflective surface to the crops, so that the crops use the reflected beam and reflects the beam back to the first reflective surface. A reflective cover is arranged at a tube-type or pipe-type lamping ceiling. A folding angle of an outer wing of the reflective cover is adjusted by the angle adjusting unit. |
