... are strobe2,the power consumption 3,low voltage or temperature not first start, several start fragile ... damaged lampsOrdinary electronic ballast50°C0.5~0.6Less or no1,A fragile, short life 2,lumens low ... coefficient 3,Electromagnetic radiation is too power to effect the around electrical equipment working.HLB brand ... Selling 250W MH/HPS Electronic Ballast from Shenzhen, Manufacture can be Customized