stock bulbs are model #893 which are 37.5 watts iirc. you can upgrade to 885's and are 50 watt. u may be having some condensation getting inside your lighting assembly to cause your bulbs to burn out.
Jim Hahn
1996 T-Red Contour SE Reborn 4/6/04
3.0L swap and Arizona Dyno Chip Turbo Kit
364 whp, 410 wtq @ 4,700 rpm