Hi Trev. The B640Z isnt a bad camera but it's DIY Hi-Watch kit. Swap it out for real Hikvision and you will notice the difference. You may find This Blog useful
These really are very poor quality cameras, you should expect the night vision LED's to fail within the first 6 months. Professionally installed CCTV is cheaper than you think. Try STL Security They have some great Blogs and offer Fixed Price Residential CCTV Installations