I sure like to say something to the last several cyclists I've encountered at night, even though they have some really nice bikes, the best of them only had the very minimal of reflective devices, and they all had no forward lighting and with one only having a rear flasher, even that was very anemic.
They seem to have the money for the bike and gear, and I guess that they probably are running dark by design, so I would consider it a waste of breath if I offered some of my older/replaced night lights to them.