The dynamical behavior of the oscillatory ClO2--Cl--iodomalonic acid reaction in a semibatch reactor has been found to be extremely sensitive to the UV light, while the light above 420 nm does net affect the kinetics. Continuous illumination increases the amplitude and the period. Oscillations art completely extinguished beyond a critical light power. Light-induced transitions from nonoscillatory to oscillatory state and bursting-like responses upon periodic perturbations with 370 nm light have been found. The light-accelerated formation of a reactive iodine species from iodomalonic acid and its subsequent reaction with the chlorite ion is responsible for the Light sensitivity of the dynamical behavior.