So, let me make sure I have this right, you have:
Contacts (under corrected, so not for day to day wear)
Driving glasses for glare, with a bi focal section for the dashboard
Varifocals for other wear but they affect your peripheral vision.
So, you get in the car, take your varifocals off, put in your contact lenses, pop your driving glasses over the top, drive, get where you're going, remove your driving glasses and contacts and put your varifocals back on.
I mean, I'm happy that works for you. But it all sounds a LOT more expensive (and faffy) than just wearing the varifocals. I can't wear contacts anyway. But my varifocals (which don't seem to cause me any peripheral vision problems, though my script isn't that different to yours) cost £600+, and that's NOT because I buy £400 frames, the frames are normally c£50-100.
Anyway. Regardless of that, the problem is the lights and we shouldn't have to shell out loads of money to fix that!