This experiment was carried out to investigate the effect of light flash program on the productive and reproductive performance economic efficiency of Dandarawi chickens. Three hundred and sixty birds were randomly distributed into three equal groups (120 birds each) and housed in floor pens and reared under continues light for 12 or 16 hours/day (C group), 6 or 8 h continues light +6 or 8 h flash light/day(T1 group) and 12 or 16 hours/day flash light (T2 group). The obtained results indicated that light flash program significantly affected body weight, daily weight gain, feed conversion and dressed carcass percentages. However, it had insignificant effects on other carcass traits, genital organs percentages, egg laying rate, egg weight, body temperature, hatchability, plumage condition, mortality rate, quality traits except shell thickness and blood traits except cholesterol values. Flash lighting program decreased significantly age at sexual maturity and improved semen concentrations and fertility percentages. Economic efficiency of the chickens was precisely decreased in flash light treatments. Finally, flash light treatments for Dandrawi chickens during growing and laying periods may be recommended.