That light will blind small cameras without a lens hood on the bottom, which is my next point, get the largest camera you can find. A dashcam is a means of protection if it happens to see anything, a large visible camera is quite the deterrent.
What are you looking to spend? You could mount this big motherfucker in place of the light, and remotely change the view to wherever you are parked that day.
http://www.amazon.com/IPCC-7210W-Wireless-Nightvision-BlueIris-compatible/dp/B00GALXXWU/ref=sr_1_2?ie=UTF8&qid=1453081841&sr=8-2&keywords=wireless+ip+camera+outdoor+ptz