[dingov70]

No you do not need to fit a higher capacity battery if you use HID or led lights , as they consume less power than halogen bulbs do . With the engine running at tickover the alternator is producing way more current than would be required for HID or LED use . In theory you could leave the lights on for far longer & use less battery capacaity doing so . I have a 1998 Tdi v70 fitted with HID dip beams & led main beams for fast reaction when switching to high beam . Both are rated at 6000K ( daylight balanced ) . My headlights are ABM units with projectors for the HID bulb . To be honest if you are fitting HID's into standard headlights with the lens pattern on the glass you may well dazzle oncoming drivers blinding them . I do not know if you have an annual vehicel inspection in Finland , but in the UK we have what is known as an MOT test , where every vehicle is inspected once it is 3 years or older , every year & we fail many cars with HID's in normal headlights