The 151 figurines were seized on Nov. 23 and 25 at the Los Angeles/Long Beach seaport complex, U.S. Customs and Border Protection officials announced in a statement released Monday.
Officials confiscated the holiday lighting fixtures after they found they had electrical adapters with fake safety certifications.
Underwriters Laboratories, Inc. (UL) is an independent safety certification organization that rigorously tests products for potential fire, shock and other injury risks and is usually marked on a product's power adapter.
Products with counterfeit UL marks have not undergone testing and can present hazards to consumers, CBP officials said.
"By seizing untested and potentially hazardous products at our nations largest seaport, CBP officers not only protect the American consumer but contribute to a safe holiday season," said Todd C. Owen, CBP director of field operations in Los Angeles.