Advertisement lighting device

[0022] In an advertisement lighting device 1 as shown in FIGS. 1 and 2, a diffusing plate 3 is provided in the front of a casing 2, and behind the diffusing plate 3, one or more horizontal straight-tube light sources such as two horizontal fluorescent lamps 4 are provided in parallel with a radiated surface 3a of the diffusing plate 3. Behind each of the fluorescent lamps 4, a reflecting plate 5 is provided respectively.

[0023] The right and left ends of the reflecting plate 4 contact a right frame member 2a and a left frame member 2b. Each of the fluorescent lamps 4 is provided in the middle of upper and lower halves respectively. The upper end 5a of the upper reflecting plate 5 and lower end 5b of the lower reflecting plate 5 contacts an upper frame member 2c and a lower frame member 2d of the casing 2 respectively.

[0024] The upper and lower reflecting plates 5 are connected to each other by connecting the lower end 5b of the upper reflecting plate 5 to the upper end 5a of the lower