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Blinking Light pattern for maximum attention distance at night

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Wilson__:
What Brinking Light on-off pattern has maximum recognization distance? at night after sunset with some man-made light in background, natural moon light and no fog/mist? 

Person is attentively seeking for the guide light. 

Maximum distance means the light is dim.

Examples are stroke red light on aeroplane top and bottom, white light on runway lead-in section (running ball of light) and red light on tall buildings.

Many thanks

 

soldar:
Flashing/strobing. Max power with minimum duty cycle. Directional if possible. Repetition rate ... dunno... depends on particular circumstances, not too frequent, not too long. Needs more frequent to first catch, less to keep locked. Start with a nice round numbre: 1 flash per second.

johansen:
3 pulses in 1 second, followed by one pulse per second, repeat. universal sos is pretty recognizable to the human brain.

Benta:
"Mr. President, when was your last election?"
"This morning, just before bleakfast."
 :-DD

themadhippy:
seem to recall the eye is most sensitive around the 6hz area,and  the standard "im lost can anyone  see me " is 6 flashes a minute with a minute gap.so id be tempted to strobe the light at 6hz with  5 seconds  strobe 5 seconds off repeated 6 times and then a minute off

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