None I suppose, assuming you use cameras with integrated IR that covers their FOV.
In addition to all of Brian's considerations, there's also the factor of what camera(s) you'll be using. The one camera I miss since going all-IP is the CNB "Mona Lisa" line, because they had by far the best low-light performance I've ever seen; I always wished they would apply that technology to megapixel cameras. The VCM-24VFs that we used extensively give amazing (SD) pictures with very little light, and a parking lot could get away with very little lighting when covered by those.
On the other end of the scale are some of the cheap Chinese cameras I use now - great picture with good lighting... and if you wanted to use them in a parking lot you'd better light that thing up like a baseball stadium.
Here is a recent parking lot. The red box is where the entry gate is for the fence. The LED light is on the Pole, with an extension arm, providing these light levels. Check with local requirements, as when you go to put up lighting on lots, you may have to meet code, else no lights might be grandfathered in... A lot of light sites will have planning tools to estimate value. This was done with an autocad plug-in....
We get very good camera footage with Avigilon cameras...
Also have a peak at these lighting resources.
The previous parking plan is in foot candles, convert using