An aiming post light for artillery and mortar operations at night wherein an ordinary GI flashlight may be used, without modification, as a post light when mounted on a support and wherein its original ordinary lightbulb is replaced with a novel bulb of same base outer configuration in which the bulb has encapsulated solid state circuitry to provide a blinking and/or steady light emitting diode (LED) as the light source. Depending upon the particular LED and circuitry selected, the light may be continuous or intermittent and may be a selected color. In one embodiment several options are available when using a single bulb.