We are Aullast based in Dongguan, China. We are member of TradeKey.com since July, 2012. Our business is related to Lights & Lighting industry and we specifically deal in ballaste,LED. Please find our product details below:2x18W T8 Straight Tube Ballastower Factor: >0.96 Norminal Voltage: AC220-240V Working Voltage Range: 198-264V Working Frequency(Hz): > 20kHz Mains Frequency(Hz): 50/60Thank you for taking time to go through our business profile. If there are any questions, inquiries or comments, please feel free to contact us.