This universal LED assortment with standard LEDs in 3 mm and 5 mm diameter with various pre-resistors, shrink-fit hose sections (shrink rate 3:1 with inner adhesive) as well as an individually extendable flexible twin flex conductor (2x 0.14 mm²) is optimally suitable for the immediate start with experiments with semi-conductor light. Through resistor combinations of parallel or Series connection or varying the supply voltage allow different operating currents (brightness) to be realized. A short description of the components included is clearly printed on the inside of the lid.The data sheet contains useful information about the assortment - as well as important technical details about the contained components. This is the only way to ensure that, for example, the LEDs can be operated in their specific parameters because the components are clearly specified.Please note that LEDs must always be operated with current limitation, WAS can be developed with the help of this set in practice