Philips has a set of low-draw LED bulbs readily available for $40 a pair. They are bright in all directions, and are a drop-in replacement for 1156, 1157, and a few other standard bulbs. They're DOT-approved as well.
http://www.amazon.com/gp/product/B00HV25XUM/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
