Are they HID's Xenon or just regular projector beam headlamps? I'm assuming they are the Xenon types. My most current vehicles all use the Xenons, it really helps with my night vision. Make sure the bulbs are a lower color temperature, I'm pretty sure most stock are 4300k or 6000k. Anything over 6000k is a waste of money and makes visibility worse. Other benefits than just being brigher are, they last longer, produce wider/deeper beam patterns, use less energy. On the downside, they are rather expensive if you have to replace one and can/will piss people off at night (I always get the hi-beam flash).
2012 Jeep Grand Cherokee Overland - 5.7L V8, QTII, Off-Road Aventure II - Max Steel/Blk
2010 Mercedes ML350 - Blk/Blk
2008 BMW 335i e90 - Alpineweiss/Blk