In addition to the electrical testing researchers looked at whether the lights had all the correct information – such as the right safety markings and instructions – needed for them to be legally sold in the UK.
However, Which? discovered that four of the five bought from Amazon Marketplace didn’t have this so were non-compliant.
In an electrical strength test, the insulation in one control box for a set of lights bought from Wish broke down, making the whole unit live, meaning it would be a hazard for anyone who came into contact with it.
The 12 unsafe or non-compliant products were purchased from third-party sellers across all four marketplaces.