If it were me I'd start adding some extra IR illumination. The 'Ghosting' issue is the camera doing long exposure per video frame and then 'stacking' video frames to improve signal to noise, which it does at the cost of increased motion blur.

Adding more IR light will improve this situation.

I installed one each of the following as en experiment and was rather impressed by the difference it made in my situation: (Not a sponsor, just a consumer)

24watt Wide Angle (good to about 20 meters)
24watt Wide Angle IR Spot light (good to about 40 meters)

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Given the area you're interested in and its distance I would think two or three of either would light that sidewalk up like a stadium when viewed thru the security camera while appearing pitch black to the human eye.

I don't know about individual bulbs and figuring out how to make all that work, but they sell these infrared lights for camera people doing night vision work. I got one so I could play my Oculus Quest in the dark, and it works great.

https://www.amazon.com/gp/product/B01G6K407Q/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

I don't know what your power and wavelength needs are, but you could gang up several of these into one custom rig without having to do fancy wiring.