| 1. Opetional wattage: 20w 26w 28w 32w2. Opetional voltage/frequency: 110 to 130v or 220 to 240v, 50Hz3. Optional color temperature: 2700k/4000k/6500k4. Optional base: E27/b225. Average life: 6000hrs/8000hrs/10000hrs available.6. Optional packaging: Blister/color box/color box+pet available.7. Certificate of the system of quality certification: CE/RoHS/EMC/ISO9001/GS etc. | 
