(57) An optical group with an adjustable light beam, comprising at least one lamp-holder
device, at least two linear fluorescent lamps (10, 11) and a specular reflector (12);
in the centre of the body (5) of the reflector (12) there are at least two curvilinear
surfaces (6, 16-19), which, by varying their angular position, allow a variation in
the form of the light emission of a lighting appliance, in relation to the various
application requirements. Solutions such as those projected allow high efficiency
levels of the lighting appliance to be maintained and obtained in particularly restricted
volumes.
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