DALI is the young generation lighting control protocol in the realm of lighting control at present, Which adopt Manchester encoding transmission, With overall, grouping dimming, addressing dimming, various scene mode set, brightness traced, etc. powerful dimming function. Modern top grade hotel, shopping mall, household increasingly request high standard to lighting system. DALI protocol bus-mastering with simple, reliable, superior function etc. features, are used widely, showing the powerful advantage in the realm of intelligent lighting control.