PURPOSE: To reduce labor and time, and saving the costs and to increase the fish-luring effect, by lighting a plurality of lamps on the same point and equipping individual glowing bulbs with a reflector.

CONSTITUTION: The lamp holder 3 has cooling fins 1, an inside space 2, and a code hole 4 opened on its tail end. The power source code is passed through the hole 4 and tightly sealed with a sealing material 6 and a metal clamper 7. The top ends of the power code 5 are connected to the terminal plate 8 in the space 2. Three sockets 9 are set to the top face before the inside space 2, so that they are arranged in equally 3-parted positions around the center axis of the holder 3. In addition, these sockets are set so that the lamps 10 a little expand outside from the parallel lines to the center axis of the holder 3. The holder 3 is equipped with 3 triangular reflectors 12 tapering from the base to the top so that they surround individual lamps 10.