At 6'2", with long legs, I have only ever had one vehicle where I didn't put the seat all the way back, and if available, reclined the seat a bit, too (long arms, as well. No gorilla jokes, please). In every car I ever owned, I have had problems when the light is mounted high, in the middle of the intersection - I have to hunch over the steering wheel to see the lights. I did just get the LightinSight do-dad and mounted it up. Works great!
For all you people out there that don't have problems with seeing traffic lights, consider yourself lucky. But for those that DO have the problem, and a bad back, as well, this is MUCH cheaper than a physical therapist...