Unfortunately TRIACs and SCRs have what's called a 'leakage current'- they are not perfect switches. Allied with some resistance and capacitance across the device for snubbing you will get a few mA of current through the device when it is turned off. The combat this you need some resistance as a load - this energy will go up as heat or use a incandescent lamp as a load. Also note there is two types(in terms of switching) of SSRs - zero crossing switching and non-zero crossing switching. If you want to turn things on or off - use the zero crossing type, if you want to do phase control - then use the non-zero crossing switching type. Fluorescent lamps can be successfully dimmed by phase control but nowadays it is better to use a dimmable ballast.