While you might not have much use for them after the silly season, throwing them in the bin can cause “serious environmental heartache,” the ABC reports.
"There probably hasn't been any specific studies into Christmas decorations and how long they last in landfill, however we know that most of those decorations have materials like plastic and they can last from 450 to 1,000 years in landfill," Planet Ark recycling programs manager Ryan Collins told the publication.
"There's some glass in certain Christmas lights [that] can last for about a million years apparently.
"I think you'll find these days a lot of the decorations are plastic, so it's basically going to be in the ground for a very long time."
Additionally, the metal wire in your Christmas lights can last up to 60 years in landfill.
Before throwing anything out, take some time to research what materials can and can’t be recycled.
As for your lights, Collins said, “The plastic light covers, they most likely will have to go into general waste, and then with cables themselves ... some electronic waste recyclers may accept them.”
"It's probably best to check with your council."
Visit Planet Ark's Recycling Near You website for advice on how to dispose of electronic waste.