Lighting unit

A lighting unit comprising:

• a light guide board;
• a fluorescent discharge tube provided on a side surface of said light guide board, said fluorescent discharge tube including an electrode portion at an end portion of said fluorescent discharge tube;
• a lead wire including a contact connected to said electrode portion of said fluorescent discharge tube;
• and
• a holder including a cavity, said cavity containing said end portion of said fluorescent discharge tube, a space between said end portion and said holder, and said contact of said lead wire inside said cavity, wherein
• an inner diameter of said cavity of said holder is larger than an outer diameter of said fluorescent discharge tube, and
• said cavity is sealed inside said holder.

A lighting unit comprising:

• a light guide board;
• a fluorescent discharge tube provided on a side surface of said light guide board, said fluorescent discharge tube including an electrode portion at an end portion of said fluorescent discharge tube;
• a lead wire including a contact connected to said electrode portion of said fluorescent discharge tube;
• a holder including a cavity, said cavity containing said end portion of said fluorescent discharge tube, a space between said end portion and said holder, and said contact of said lead wire inside said cavity, and said holder comprising an inlet port for said fluorescent discharge tube leading to said cavity;
• and
• an elastic body provided between said fluorescent discharge tube and said holder so as to be in contact with said fluorescent discharge tube at said inlet port, wherein
• an inner diameter of said cavity of said holder is larger than an outer diameter of said fluorescent discharge tube.