well with the past few snow storms with total snow over 3ft, and driving though deep snow. the fog light became packed with snow

so after digging the snow out a few days later. i notice i lost a bulb and the glass of the bulb broke inside the light housing.

so i had to remove the fog light assy off the bumper, take in in side to clean the glass out and dry it out

then i notices that the light housing has a vent at the top just over the bulb, so a little bit of melded snow made its way in

also on a side note the 9140 bulb isn't to easy to find the dealer and napa are the only ones i found to carry them

 

Yup i noticed that vent as well. with my girlie pirellis on the truck. i dont trust it to drive in anything over 1/4 inch!!.

you can run a 9145. i dont believe them to be much brighter, or run that much hotter than the 9140's. i installed slyvania ultras when i bought my truck.