Abstract: A visible or invisible light-producing device in an inert target practice projectile creates visible and/or infrared light initiated by a deceleration sensitive triggering element when the projectile impacts a target. A visible signature is creating for recording the impact to provide training without the use of any pyrotechinc, or other hazardous materials being deposited on the impact area. The light producing device may be initiated by fuze electronics—prior to actual impact—to facilitate simulating an airburst projectile for training or testing purposes.