Little Daddy:

Don't know about Mexico, but in the USA you can buy a disposable camera with a built in strobe for $15 or so. Shoot the pictures and request return of the camera, rip the flash out and go. But. These are high voltage devices, and they use a high frequency oscillator for their voltage conversion. Possible RF interference. And their cycle rate is probably lower than you would want. When the strobe fires there is a high frequency discharge aross the flash tube, another possible RF interference source. All round, I'd say a true strobe light is not what you want.

But. A 555 timer can esily be wired to blink an ordinary flashlight bulb. By picking the battery voltage and the rated voltage of the bulb you can make it brighter or dimmer as you wish.

Hope this helps.

Bill.