Never heard of Night Light Coin. But, airdrops are supposed to be free coins you receive on your wallets after you register or complete certain task. You don't have to pay anything for it. Either your friends account got hacked and the hacker is trying to scam everyone on his list, or your friend does not know what he is doing. Either way, you should alert your friend about it. Even if you do wish to proceed (which I would strongly advise not to!), make sure you do proper research about the project.