As far as headlights at near light speed they would function normally.
I never said that. I said when you're going FASTER than the speed of light, not near it. If you were giving an example thats fine, if you thought I said that, please read my post again.
As far it comes to going from a blur, to white, and then to black, you're basically telling me you're losing consciousness. The G forces involved at the speed of light are crazy, but doesn't necessarily mean that a human will 'NEVER' be able to try it. In the 1930's and 1940's, pilots only dreamed of breaking the sound barrier. Most pilots at that time believed it was impossible. Look at us today in 2008, we have MiGs, Su's, Tu-160's, F-16s, and F-22s that can break the sounds barrier. No commercial plane can go over sound barrier? Think again, the Concorde could reach speeds of Mach 2.2, of course its out of service today.
Now, to help pilots survive massive G forces, the G suit was invented. So why not invent some clothes or device that will help humans survive massive G forces during the speed of light. Obviously today we think its impossible... but we just haven't done enough research and haven't opened up enough technology yet. Time Dilation is hard to explain, but gravity has a lot to do with it. Basically our bodies grow on steady G forces, in space, people can't grow as easily, its zero gravity. Well they can, but not as planned. Lets say a spaceship is going faster than the speed of light with humans in it to another galaxy. To the viewers perspective, you think that you will reach there in 2 weeks. On Earth's perspective of time, you'd think the spaceship will get there in 100,000 light years. When the spaceship reaches the galaxy, the humans can walk out (if they find a planet), and see that to themselves about 2 weeks passed. The humans didn't necessarily get older, gravity prevented. On earth meanwhile, it is the year 100,008. We aren't 100% sure of how dilation 'works', but aging and gravity is a good theory.