You can hardwire LED light strips to a light switch, but it usually isn’t necessary. Most LED light strips run on 12 or 24 volts and use a power adapter that you plug into your wall outlet. “I suggest finding something either 12V or 24V, which is considered extra-low voltage,” says Belanger. To wire that kind of LED light strip to a light switch, you need to obtain a separate transformer and wire the transformer to the light switch. In that case, you’re usually better off consulting with a professional electrician,“ says Walter. “That way you'll ensure the job is done right.”