Illumination apparatus for surgical instruments, comprising a light source, an external power supply source, wiring connection means for connecting said light source to the said power supply source; a casing for housing and protecting the said light source, said illumination apparatus having: - the light source is a Light Emitting Diode able to provide a light with an intensity of at least 10,000 milicandela (mCD), - the external power supply source is able to provide a voltage current of approximately 3 volts to the light source - the wiring connection means comprise a switch to turn the light source ON and OFF, and is connected to a transformer that reduces the voltage of the grid network electrical current to the intended voltage of the light source of approximately 3 volts, and - the casing is a truncated-conical shaped casing made of plastic, metal or metal alloy comprises a hollow main body, two openings located one opening at each end, a cup-shaped cap made of glass or transparent acrylic located at the larger opening of the casing and a flap, wherein • the two openings, the first and larger opening being designed to accommodate the light source and the cup-shaped cap and the second and smaller opening having a seal is designed for allowing the connection means to pass from the inside of said casing to the exterior to connect to the power supply, • the cup-shaped cap is located at the larger opening of the casing in a sealable manner, and being removably fixed to the open end of said casing by snap-fitting the cap into an internal annular groove made along the inner circumference close to the border of the open end, the circumference of the cap being essentially identical to that of the open end and the latter being slightly flexible, and • the flap having an essentially rectangular bottom and top surface planes, projects itself along an imaginary line that is tangential in relation to a point on the circumference of the main body and is integral part molded together with one of the halves of the main body, the top plan of said flap having at least 3 circular recesses placed equidistantly from each other along its longitudinal axis, each of these recesses accommodates a disc-shaped magnet. - the light source is a Light Emitting Diode able to provide a light with an intensity of at least 10,000 milicandela (mCD), - the external power supply source is able to provide a voltage current of approximately 3 volts to the light source - the wiring connection means comprise a switch to turn the light source ON and OFF, and is connected to a transformer that reduces the voltage of the grid network electrical current to the intended voltage of the light source of approximately 3 volts, and - the casing is a truncated-conical shaped casing made of plastic, metal or metal alloy comprises a hollow main body, two openings located one opening at each end, a cup-shaped cap made of glass or transparent acrylic located at the larger opening of the casing and a flap, wherein • the two openings, the first and larger opening being designed to accommodate the light source and the cup-shaped cap and the second and smaller opening having a seal is designed for allowing the connection means to pass from the inside of said casing to the exterior to connect to the power supply, • the cup-shaped cap is located at the larger opening of the casing in a sealable manner, and being removably fixed to the open end of said casing by snap-fitting the cap into an internal annular groove made along the inner circumference close to the border of the open end, the circumference of the cap being essentially identical to that of the open end and the latter being slightly flexible, and • the flap having an essentially rectangular bottom and top surface planes, projects itself along an imaginary line that is tangential in relation to a point on the circumference of the main body and is integral part molded together with one of the halves of the main body, the top plan of said flap having at least 3 circular recesses placed equidistantly from each other along its longitudinal axis, each of these recesses accommodates a disc-shaped magnet. • the two openings, the first and larger opening being designed to accommodate the light source and the cup-shaped cap and the second and smaller opening having a seal is designed for allowing the connection means to pass from the inside of said casing to the exterior to connect to the power supply, • the cup-shaped cap is located at the larger opening of the casing in a sealable manner, and being removably fixed to the open end of said casing by snap-fitting the cap into an internal annular groove made along the inner circumference close to the border of the open end, the circumference of the cap being essentially identical to that of the open end and the latter being slightly flexible, and • the flap having an essentially rectangular bottom and top surface planes, projects itself along an imaginary line that is tangential in relation to a point on the circumference of the main body and is integral part molded together with one of the halves of the main body, the top plan of said flap having at least 3 circular recesses placed equidistantly from each other along its longitudinal axis, each of these recesses accommodates a disc-shaped magnet.