Auto HID kit(12v,24v,35w,50w),Power less than 35w FIT for all cars,motors,buses Quality of products all based on the raw material,you know there are so difference If we choose difference raw material component,both of component we choose standard F grade,not the k grade or some recycle component from other electronic product. Then let us analyse the cost of HID kit: The ballast cost ,if the ballast raw material less than the cost 11.37 US$ per pc,and also if the bulb cost less than 4.8 US$ per pc,we can not make sure the product quality.also manufacture need to add the labouring cost and the process fee for this product,also color box cost etc,transport fee,etc,so i think you can understand this price well. Ballast electrical parameter: FP-SB 1) Input voltage: 8~18V 2) Rated voltage:12.6V 3) Max input current: 6.5A 4) Rated current: 3.3A 5)Max input wattage: 34?W 6) Working temperature:-45~+125 FP-MN 1) Input voltage: 8~18V 2) Rated voltage:12.6V 3) Max input current: 5.8A 4) Rated current: 3.3A 5)Max input wattage: 34?W 6) Working temperature:-45~+125℃ Available lamp types: H1, H3, H4, H4(hi-low), H4(xenon/halogen), H4double, H6, H7, H8, H9, H10, H11, H13, H13(hi-low), H13(xenon/halogen),H13double , 9004, 9004( hi-low), 9004(xenon/halogen), 9004double, 9005, 9006, 9007, 9007(hi-low), 9007(xenon/halogen), 9007double, D2S, D2R, D2C, D1S, D4C, D4S, 880, 881, 889, 893, 894, 21W, 24W, 32W. Our ballast match with all bulb factory. FP-HID kit FIT FOR all cars,motors and buses.Also we supply HID-flash lights use for army,people and others. From the business start, we are honestly to provide reasonable information to our customer.