A lighting device (LIGHT) for facilitating the reading of graphic and/or text content on any support by dyslexic subjects, said lighting device comprising a control unit (CTRLU) suitable for the generation of an activation and deactivation command signal of a non-permanent light beam and a lighting module (LIMOD) suitable for the generation of said non-permanent light beam in a visible light spectrum, said lighting device (LIGHT) being controlled by the activation and deactivation command signal of said non-permanent light beam, said lighting device (LIGHT) being configured to periodically activate and deactivate said non-permanent light beam according to successive cycles operated at a predetermined frequency Fd which is a reciprocal of the sum of an activation period of said non-permanent light beam and of a deactivation period of said non-permanent light beam, each cycle having a duration T and comprising a period of activation of said non-permanent light beam of duration T1 followed or preceded by a period of deactivation of said non-permanent light beam of duration T2, the predetermined frequency Fd being such that Fd=1/(T1+T2), the activation and deactivation command signal of said non-permanent light beam being characterized by the predetermined frequency Fd and the cyclic ratio thereof T1/(T1+T2), the predetermined frequency Fd being comprised in an interval of values going from 60 to 90 Hz, and a duration T1 of the activation periods of said non-permanent light beam being comprised in an interval going from 15 to 30% of the duration T of the cycles, said device being characterized in that same comprises a switch configured for selectively obtaining a permanent light beam called ordinary lighting and said non-permanent light beam under electronic control, so as to allow a user subject to dyslexic problems to compare their usual performance in reading with ordinary lighting to their performance obtained under electronic control of said non-permanent light beam. said lighting device (LIGHT) being configured to periodically activate and deactivate said non-permanent light beam according to successive cycles operated at a predetermined frequency Fd which is a reciprocal of the sum of an activation period of said non-permanent light beam and of a deactivation period of said non-permanent light beam, each cycle having a duration T and comprising a period of activation of said non-permanent light beam of duration T1 followed or preceded by a period of deactivation of said non-permanent light beam of duration T2, the predetermined frequency Fd being such that Fd=1/(T1+T2), the activation and deactivation command signal of said non-permanent light beam being characterized by the predetermined frequency Fd and the cyclic ratio thereof T1/(T1+T2), the predetermined frequency Fd being comprised in an interval of values going from 60 to 90 Hz, and a duration T1 of the activation periods of said non-permanent light beam being comprised in an interval going from 15 to 30% of the duration T of the cycles, said device being characterized in that same comprises a switch configured for selectively obtaining a permanent light beam called ordinary lighting and said non-permanent light beam under electronic control, so as to allow a user subject to dyslexic problems to compare their usual performance in reading with ordinary lighting to their performance obtained under electronic control of said non-permanent light beam.