THe bottom line is : If someone does have an accident,
will you see them face down in the water in the dark ? Probably not.
If someone does get into trouble you are forcing would be rescuers to begin a search in the dark. They will love that !
I am sure the first thing you will get is a dressing down about going out in the dark by any coast guard effecting a rescue.
GLOWSTICKS may work well on a kite in the air but you will not see a glow stick at water level at night from 80m on a flat day add 1ft of chop and that cuts down to about 10m depending on your own elevation.
Remember the guy at BOndi on TV?......... well how do you guys feel about being on TV because if someone in your group does get lost or is killed and you guys were out in the dark you are going to get bagged for it. Even the people who are currently condoning your actions will turn on you pretty quickly. Do you fancy doing an interview like a rabbit in the headlights in your wetsuit on the beach in the dark whilst boats and helicopters search for your mate.
Sorry to be the killjoy I have been out at night before and it is fun but the dangers are magnified and any incident will reflect poorly on the kiting community as a whole.
THink about it guys !!!!!!!!!!