Source of light, illuminance, spectrum, RGB model of mixing colour

General educational program for high school in Czech Republic does not contain photometry. We encounter with the concepts of light, illumination, lighting standards and protection of eye in our everyday life. The aim of this work is to create light source for pupils? experiments. This source will consist of RGB LED and UV LED. Teachers can make this source very easy and it is very cheap. Then the pupils can do various experiments with this source. For example they can demonstrate mixing of the colours, measure reflection and transmission of light. Also they can measure quality of sunglasses filter with the source. Pupils can try if some object is invisible in special light (for example blue object in red light). These experiments show photometry as interesting part of physics. Pupils use the modern equipment during measurement and appreciate that the task relate to their everyday life.