How to determine whether LED wash wall lamp manufacturer and reliable?

Through introduction and analysis of the articles will be able to understand, for the LED wash wall lamp manufacturer, want to determine whether or not he, can according to the above method to judge, when choosing these manufacturers, of course, also do not only focus on the quality of these wash wall lamp, because must also take into account the comprehensive cost problem, so in this case, it must be taken into account and a balance between quality and price!