While UL safety standard might come in different forms, a the end it is all the same. Your electrical device should have either UL, ETL, SGS or TUV mark printed on it, these markings identify that your device has been tested to UL safety standards by one of these labs. unfortunately you might find products that might have used these marks with out proper testing or authorization that is why you should always purchase a product from a trusted brand and question if the product is too cheap.
