RE: If you were traveling at light-speed and turned on your headlamps....
Supposing that you were traveling at the speed of light, nothing would happen if you turned your headlights on. You, as well as the light being emmitted would be traveling at the same speed. Light speed is pretty much accepted as the "universe speed limit"...It would be pretty hard to test this theory though since you would need an infinite amount of fuel to propell an object with mass to light speed.
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96': Rebuilt 3.8, Hurst short throw, eBay CAI, Taylor wires, Eibach Sportline Springs, Tokico shocks, Steeda C/C plates, ASP udp, H-pipe dual exhaust w/ Flowmaster 40 Series
RE: If you were traveling at light-speed and turned on your headlamps....
Han Solo made the Kesal run in less than 5 parsects for ****s sake!
The only way to answer this question is to get your hands on a torque monster v6 and break the speed of light in it! (torque monsters have been know to break the speed of light from time to time)
RE: If you were traveling at light-speed and turned on your headlamps....
Maybe the lights would seem to turn on more slowly since you were traveling the same speed as light.
Then you could bitch about having bad light bulbs.
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2006 GT Premium, 5 Spd
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...more to come
Now, if one looks under the Lorentz Transformation section, you will see some equations. Pay attention to gamma. Gamma has a term in the bottom equal sqrt(1-(v^2/c^2)). Now, as one approaches the speed of light, the gamma term will blow up to infinity and eventually become undefined if you actually hit the speed of light. This in the real world cannot happen. So, if you put 2 and 2 together, it is impossible to travel the speed of light due to this little factor. Lets also mention time would be dilated, and the length of your little 'super car' would also change. But that is a different story and we'll leave that discussion for another day.