... 4.10 years OEM Specification:1,diameter: 9mm2, voltage: 110v,220-240v3,power: 15w4,color temperature: 6400k/2700k5,CRI> 806,PF ... protection requirents.2. Up to 80% energy saving than standard incandescent lamp3. Long life time: Average life time is 8000 hours ... , table lamps, wall lamps, ceiling lamps. T2 Spiral Energy Saving Bulb 5w-20w