Bright lights stay in vision too long, should i be concerned?

Depends but too long means?: If you feel that bright lights stay in your vision so long that it's disturbing, distorting, or disabling you from seeing clearly, for example when you're driving and the oncoming headlights are blinding you afterwards, or flashbulbs brightness last too long, then you need to see your eye doctor. A/he may do a simple test to measure the electrophysiology of your eyes. This will help to determine if it's abnormal or not.

Afterimage: Groups of receptors in the retina modify the signal they send to the brain when looking at the same image for a while. They may even send an opposite signal as they balance the inputs for maximum vision. Looking at a yellow light will often cause a purple afterimage for a few minutes. It is harmless. Enjoy the show.