A white LED module as a light source for slit lamps allows for bulb replacement by a white LED in slit lamps manufactured by Haag-Streit or of similar variants of slit lamps having a light source positioned above the lens. The module is mechanically, optically and electrically compatible with the existing slit lamp. The original bulb can be exchanged with the white LED module manually without using any additional tools. The module with a white LED as a light source for slit lamps that replaces a bulb as a light source in slit lamps manufactured by Haag-Streit, characterised in that it consists of a housing (1) with ribs (2) for cooling, of a cylindrical casing (3) with a contact site (4) on the top of part (3a) of the casing (3) and a contact site (5) on an extended part (3b) of the casing (3). A housing of an electronic assembly (6) is arranged on the third part (3c) of the casing (3), said housing allowing for proper operation of a white LED (7) within standard voltages received from a regulation power supply (24). The interior of the housing (1) is shaped as a wide cylinder (1a) in its upper part, whereas its lower part (1b) has a shape of a narrow cylinder, whose height is approximately 5/6 of the height of the housing (1). The casing (3) is screwed to the housing (1) with screws (9 and 10), whereas a holder (8) of the white LED (7) is fastened to the bottom surface of the housing (1). The ribs (2) of the housing are equidistantly arranged on the circumference of the housing (1). The housing (1) with the ribs (2) is positioned in the interior of the existing slit lamp in a way that the external edges (2a) of the ribs (2) fit onto the holder of the bulb module after the latter has been removed.
