To provide a fluorescent tube floodlight which can optionally adjust the directivity of the illuminating light, even though a fluorescent tube is used having merits such as electric power saving, high efficiency and small wattage, and low heat generation.
Tubular fluorescent tubes 2b, 2b overlap each other forward and backward in respective light sources 2-1 to 2-4 at positions of the smallest light source area, the light directly illuminated from the light sources becomes minimum, and the reflected light becomes maximum, whereby a light beam high in directivity is obtained. The tubular fluorescent tubes 2b, 2b are located up and down of the respective light sources 2-1 to 2-4 at positions of the greatest light source area, the light directly illuminated from the light sources becomes maximum, and reflected light becomes minimum, whereby scattered light low in directivity is obtained. Since the respective light sources 2-1 to 2-4 can be continuously rotated by driving of a turnable mechanism 5 by operation of an operation tab 4 and fixed at any positions, optional illuminating light between the light high in directivity and the light low in directivity can be obtained.
Mitsuo Chonan
Ishiwatari Eibo