... ,Good day!Welcome to our page. We are one of the most professional digital ballasts' manufacturers who ... Energy40%~50%Designed life for ballast6 YearsFactory Warranty2 YearsProtectionHot Start Protection, Short Circuit Protection, Opening Circuit Protection, Over ... us.Best RegardsDavid SongSales ManagerQidong Sunkan Electronic Co.,LTD. 400V 600W electronic ballast for hydroponics/greenhouses,UL,CE,TUV, ...