The SFI solution stops nuisance flickering in LED down lights associated with the off peak hot water tone injected into the supply, which is common in NSW and QLD. By using the SDD400SFI dimmer AND SFI (only) compatible down lights from SAL, this flicker is eliminated.   Limitations There are some limitations to the number … Continue reading How many SFI enabled lights can be controlled per SDD400SFI Dimmers