20W Half-spiral Lamp/CFLs 1. Wattage: 20W 2. Voltage: 110-130V/220-240V 3. Tube: 7mm 4. Luminous: 1100lm 5. QTY/CTN:50pcs 6. Certificate: CE 7. Package:Color box with corrugated outer box   Feature: High luminous efficacy by using triphosphor Average lifetime: 8,000 hour Color temperature: Warm white: 2,700K Cool white: 4,200K Daylight: 6,400K   1,HF electronic ballast inside,instant start and low temperature rise,providing a pleasant and safe working environment 2,Wide voltage range circuit withstands frequent voltage fluctuation 3,Up to 80% energy saving than standard incandescent bulbs,and long life span up to 8000hrs 4,Compact size fits many small fixtures