Lexus LS 2007+ :: Low Beam Light Goes Out While Driving

What is happening is my driver's side low beam light goes out while driving. I usually can notice a little flickering of my headlights prior to this happening and then all of a sudden the left bulb goes out. I then shut off my headlights for a second and turn them back on - and they tend to stay on for the remainder of my journey. This now happens every time I use them. It goes out, I shut them off, turn them back on...then the problem tends to be gone for the rest of my trip...unless I shut the car off, then it will happen again (once per drive cycle it seems).

I imagine it's not a bulb because those either work, or they're burned out. I would think perhaps it's a loose connection, but it happens only once per drive cycle and it happens every single time. Loose connections aren't as predictable as that.

I'm not really sure what the headlight systems of these cars include...weather it be resisters, modules, motors, etc. I realize the headlights turn when the steering wheel does, so there is a motor involved. I know when I bought my car the driver's side headlight assembly was replaced, but it didn't give me any troubles for the first year I've owned it. It is very cold where I am right now, with temperatures in the often falling into the single digits.