yaris bj. 99 : watt limit dipped light?

Hello together I am still quite fresh here (quasi a rookie? ) excuses therefore if something does not end up somewhere where it should… I have a question: For my Yaris I need a few new Ablelllichter size H4. Have found at ebay which in xenon optics with 6000K. Unfortunately no information about the watts that the lamps need. Is there a upper limit that can be installed?? What do the cables/mounts/battery/sicherung at all hold out that I am not there in half dark before nem bre Is it necessary to register the (bold question but wants to be 100% sure) someone has even made experience with such xenon optics that he wants to share? I am particularly interested in the light yield that I can then gain from such lamps or whether I will have clear deficits in terms of range/visibility… Thank you and love greetings