1. less four MOS transistors than AC, and simplifies some of the control circuits, the cost reduced.
2. DC ballast,output is galvanism, not frequency, four MOS transistors, the stringent requirements of the same parameters, if not, it is easy to burn, therefore, relatively speaking, the failure rate is reduced.
3. DC ballast, DC bulb needs to match, if the AC lamp which is easy to burn;
4. DC ballast, not easily broken, but relatively speaking bulb life will be shorter;
5. DC ballast, currently there is a problem to be solved is: In the lighting process, there will be flickering in the short term there is no way to solve, to be resolved within the industry

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