Features: 1) Voltage: 110V / 220V 2) Frequency: 50Hz / 60Hz 3) Color temperature: 2,700K / 4,000K / 6,400K 4) Average usage life: 6,000 - 8,000hrs 5) IRC: >82 6) Without black or yellow rings at tube ends within 2,000hr Inner packing: Paper sleeve Outer packing: Carton