| 20100171432 | METHOD AND APPARATUS FOR PREVENTING INTRUSION - A method of controlling one or more light sources for preventing unauthorized intrusion or/and staying within an area outdoors or indoors, for example in a building, in a portion of a building, in a vehicle or in a craft, wherein the light source or light sources are controlled in such manner that one or more of the following characteristics of the light are altered, viz. the intensity of the light, the wavelength of the light, the frequency at which the light source or light sources are switched on and the time during which the light source or light sources are on. The invention also comprises a corresponding apparatus. | 07-08-2010 |
