I want to buy extentions but i'm going on holiday soon and my hair goes lighter in the sun what shall i do?

-Should i wait till after my holiday to get them or will i be ok to get them now to take on holiday, i'm just worried if i get them my hair colour will change whilst im on holidayYou can dye your extentions, or get a lighter colour they look like highlights when your hair is blond!
Wait til after ur holidays to get extensions