How to build a cascading lighting control system triggered by a DRL-12 laser distance sensor? The following components will be required: TheDRL-12staircase motion sensorensures fully automatic light control. The AS-225staircase timer allows you to achieve the effect of lamps switching on sequentially. The lamps are LED staircase fixturesfrom our range. Power supply - ZI-20-12 P. How to connect these devices together and achieve a spectacular light cascade effect? Watch the tutorial below.