I don't understand is Lights (the album) not selling or something? Why would they need to put Lights on her second album if it's helping the album sell the album it's originally on?

For what it is worth I don't think she needs to put off her second album it's already been two years since she released her debut, but I definitely think they should try to release Starry Eyed for the second single for Lights (the album) and then move onto Halycon in the US. While Halycon does it's thing in the UK and then they promote the first single there. She needs to make sure she isn't a 1 hit wonder here and there is too much momentum coming off of Lights in the US.