The rules (UL) :
UL is the insurers laboratory (Underwriter Laboratories Inc.) the abbreviations. UL safety test is the most authoritative, and it is also the safety test and engaged in identification of the larger folk organization.
CE (the rules) :
In the past, European Union countries import and sales of the product requirements vary, according to one country standard manufacture products to other countries may not extremely on CE certification logo city, as the elimination of trade barriers of the hard part, CE arises at the historic moment. GS (DE rules) SAA Macao rules PSE (sundials)