Global-Standard Testing service Co., Ltd. Shenzhen (GST) is a professional testing service organization, which located in Shenzhen, China. GST delivers one-stop testing service including inspection, testing, auditing, certification and related technical assistance for wide range of products such as Luminaries, Household Appliances,Electronic Equipments, Components, Tools, Audio & Video and etc.. When appropriate, GST also provides training and advisory services. The establishment, implementation and maintenance of laboratory in GST are strictly under the instruction of ISO17025 standard. The lab is acknowledged by top international testing organizations (ITS,ETL,UL,TUV,SGS,KEMA,BV and etc.) as well. In lighting/LED/luminaries/Household Appliances/Electronic Equipments area, our key clients include companies like Royal Dutch Philips Electronics Ltd , Bravilor Bonamat, Hafele, MK and etc