The only solution is to buy a good night vision camera. You should look at various tips at the time of buying night camera. Focus on following factors:
Decide Between a Color or Black and White Camera
Choose the System Connectivity Type
Consider an Outdoor or Indoor System
Choose the Number of Cameras in a System
Decide Upon Light Sensitivity and Lux.
If you are looking for the cheap and good security camera then visit following link:
http://homesecuritypacks.com/
You can get good gadgets here for your home security.
I have read all your posts and personally think that is is a good idea actually you should go for it as if you have any issue further than they can be solved later.