unless you upgrade the wattage you're not going to burn anything more than a stock bulb is. With that being said unless you're not going to see any better with a silver star or similiar bulb.
Your best bet go buy H9 bulbs. They should easily interchange into the low beams. You'll gain over 1000 lumens per headlight... all you have do is cut a piece of plastic in the connector base on the h9 to use it in the h11 connector.