The added heat of high wattage bulbs is not good for your headlights and wiring over the long term.

The euro lights I put on my 240D had high wattage bulbs in them when I installed them. They had a terrible burning smell and the heat had melted insulation on some of the wiring and corroded the adjusment threads.

Euro's with limited wattage bulbs are the thing to do if you are interested in them living for a few years.

My $0.02,