Simply surf: http://www.sylvania.com/ConsumerProd...lacementGuide/
Within above URL for a 2010 Dodge Ram Pickup, I found:
2010 DODGE Ram Pickup (With 2 headlamp system)
High & low beam headlamp
H13 (9008) - shown at: http://www.sylvania.com/cgi-bin/MsmG...ost&hiword=H13
H13ST SilverStar: The brighter and whiter light. Up to 35% brighter, up to 30% more downroad visibility and up to 35% more sideroad visibility.
2010 DODGE Ram Pickup (With 4 headlamp system)
Low beam headlamp
H11 - shown at: http://assets.sylvania.com/assets/im...8fe4d350d7.jpg
H11SU SilverStar Ultra: The brightest and whitest light. Up to 50% brighter, up to 40% more downroad visibility and up to 50% more sideroad visibility.
H11ST SilverStar: The brighter and whiter light. Up to 35% brighter, up to 30% more downroad visibility and up to 35% more sideroad visibility.
H11XV XtraVision: The brighter light for upgraded performance. Up to 30% brighter light and up to 25% more downroad visibility.
If your specific Dodge Ram uses 4 x headlight bulb system, then H11 bulbs are used as factory low beams (which can be confirmed within its Owners Manual - under its light bulb replacement details section). If H11 bulbs, I would simply replace the factory low wattage H11 with the modified "off the shelf" higher wattage H9 bulb. Simply modify the steel base of the bulb and install. Then, adjust the aim of the new bulbs. Being a little brighter, you may have to point their aim slightly downward. Especially while towing - when a Tow Vehicle has natural rear sag (which points all front lights upwards).
For more details about H11, H9 and other bulb details, surf details within: http://www.sylvania.com/cgi-bin/MsmG...ost&hiword=h11
Note: To modify the H9 bulb's steel base, I use a rotory tool like: http://images.amazon.com/images/P/B0...CLZZZZZZZ_.jpg
With a little stone bit, it easily grinds the 3mm steel section away. And, remember to NEVER touch the glass with your bare fingers. Always use a dry tissue between fingers and glass. Thus, no natural oil is transfered from your fingers to the light bulb glass.
Hope this helps....