Hi. My v40 has 'regular' headlights not the bi-xenon types. Ive tried both as demo had xenon and they were massively better I have to admit but too much of a costly upgrade for me. Driving in the dark a lot now I would be interested if there is a simple bulb upgrade to do for improved light? I thought I saw that some people had upgraded their stock bulbs in the non xenon units to Osrams? Anyone have any experience in this and suggest what bulb types to purchase (wattage, fitment type etc) ?