Outside security perimeter lights should definitely be motion sensored but you should still be able to control them by either switching them of totally or some of them have have the abilty to be switched on permanantly when flicking the lightswitch on and of two or three times.
In addition to security lights invest in a good pair of night vision goggles at least level 3 or higher, preferably with a head harness so as to keep your hands free, takes a bit of time and practise to work efeciently with them on.
When security lights do come on your first insticnt would be to go to the closest window to check what you see. It is very important to install your security lights that they do not create a backsplash of light on any windows on your home, when you move a curtain or in front of the window you will bee seen. To solve the problem have somebody go outside and play intruder so they can establish where your problem areas are. Either then install the light in different location, add a reflective funnel around the light, but the best solution is plant post about a meter away from your house and about two meters tall and attach your light to that.
Security lights that stay on permanently through the night creates shadows in your garden and creates dark spots where intruders can hide. The way to prevent this is to install flood lights on a 10 to 15 meter mast.
Inside your home a lot of devices such as celphone chargers, clock radio`s have small led lights that give of ambient light in a room. In total darkness you can detect movement in a room from outside. Tape over these led lights with a bit of insulation tape.
When installing a camera system look for cameras that is IR (Infrared) capable and HD resolutions and also motion activated, they need a range of no less than 15 meters. If possible install them facing each other about 10 meters apart, this gives you overlapping views and you would be able too see if someone tampers with cameras as well. Here they have a IR, HD camera with a range of 400 meters with IR lazer for the light source, with high speed rotation and tilting, it is portable as well and can be mounted on vehicles roof with magnetic plates. It uses 12v power source. Cost about R 20 000-00 ($ 1500-00).