Full color illuminating unit

A full-color illuminating unit comprising

• a first circuit board which is a disk having a hole and a plurality of green lights and red lights installed around said hole;
• a second circuit board which is a disk including a blue light installed thereon;
• a first housing means comprising an isolation plate integrally connected with an inner periphery thereof, thus separating said first housing means into a first cavity and a second cavity, a first boss protruding from said isolation plate to said first cavity, said first cavity and said second cavity being in communication with each other via said boss, said first circuit board being positioned in place, with the hole thereof receiving said boss, said blue light positioned in said boss, with a portion thereof protruding beyond an opening of said boss, an annular protrusion extending from said isolation plate thus separating said second cavity into a first recess enclosed in said annular protrusion and a second recess out of said annular protrusion, said second circuit board being received in said first recess, a ring seal being received in said second recess;
• and
• a second housing means substantially being a barrel firmly attached to said first housing means, thus enclosing said second circuit board.