... dim light and no UV radiation - Above 8, 000 hours of serving life 2. Technical Parameters: - VOLT: 100, 110, 120, ... : 1100 Celsius degree- Color temperature: 900-1500 Celsius degree- Surface temperature: 500-900 Celsius degree- Continuous servicing hour: 6,000 ... can also design and produce carbon fibre heating tubes according to the needs of customers on operating voltage, power, size, length etc. ...