Garage Lights

We have two lights on the outside of our garage door that I love. Unfortunately, something must be wrong with the wiring because I can not keep a bulb in them for more than 2 months. We have tried every type of bulb and I think I may have to resort to desperate measures. Maybe I need to invest in some low voltage outdoor lighting and perhaps a few more than 2 to illuminate the garage. This way I will still have the lighting but I will have the lower voltage system that seems to last longer than the one I have in place.