Headlights blink once then turn off ?

Basically that's it I just had it happen tonight and it seemed to be only when high beams were on but im unsure. I was driving and all of a sudden the headlights blinked off (not flickered, almost as if you turned them off) then came back on and then blinked off and did not come back on until I turned the head lights off and then back on again. Anyone have any clue as to what it may be?