Problems with 2009 Toyota Prius EXTERIOR LIGHTING

On our 2007 toyota prius the drivers headlight will go out shortly after turning it on i have replaced the bulbs with the same problem recurring currently trying to get toyota to resolve problem at no cost to me. *tr

I have noticed for some time now allot of toyota prius cars driving in dark conditions with no headlights on. the tail lights are on but no headlights. this would suggest to me that there is a manual headlight switch or else different parameters for the head and tail lights. as for the reason, i believe to conserve power on the electric batteries. if the driver is in control of the headlights this control should be taken away. it is rare in this day and age for a manual headlamp switch even on the most basic cars, so i believe toyota was fully aware of what they were doing and what the drivers were likely to do. but yet toyota made sure they were legally covered with the tail lights. after all if the driver hits a car or pedestrian its the drivers fault but if toyota prius cars suddenly start getting rear ended, its toyota's fault. if the headlamp is not in control of the driver why the difference in timing when they come on? i would suggest again to conserve power and make their cars go farther on electric power at the expense of public safety. i am writing this primarily from a pedestrian point of view because i am a runner and have had a couple of semi close calls because of the headlight issue and one closer call because they are so quiet. *tr

Headlamp failure on 2006 hid toyota prius. *tr

While driving on several occasions either one head light will go out or on some occasions both headlights will go out. if i turn the lights off and then on they will come back on. *tr

Passenger side headlight goes off intermittently. i noticed it around may 2009, and reported it during my may pre-paid toyota scheduled maintenance., which was the last one for my plan. toyota said they found no problem. the incident is noted on my toyota paperwork. *tr