... and other company slim ballast: EK strict Quality ControlDifferent QC Testing as below: High/Low Temperature TestedIEC68-2-6 Tremor ... ballasts must pass our strict QC pass, aging testing, High-Low (-40°C - 85°C ) temperature testing.Our prodction line - Ballast production passing ... It means, when fiish proudction, we don't do any testing, the broken ballast just 1%. Actually in China market, if ...