| 摘要 |
PROBLEM TO BE SOLVED: To provide a security lighting system capable of improving security effect. SOLUTION: This lighting system comprises a mercury lamp 21; a casing 11 having a base 22 installed with the mercury lamp 21; and an annular condenser lens 41 partially installed to the casing 11, formed with a convex lens 43 condensing the light emitted from the mercury lamp 21; in the circumferential direction. |
