I first installed pulselites on an A109AII some 25 years ago, and made a basic mistake by accepting the 'normal' setting where the lights flashed alternately. Until a mate pointed out that with the lamps so close together there was no apparent flashing or pulsing from more than a kilometre away, as they blended into one light on all the time.
Reprogrammed to pulse together made a big difference, but as already said you need the lights as far apart as possible. And yes, they do attract the attention of bird life as long as they are within the vision of said birds: if they aren't looking your way then they won't see you!