All solid-state relays, triacs, SCRs, and X10 have a small leakage current when off, which is not normally a problem.
Why are you worried about that? The only time it would be of concern is when you are working on the circuit. Even then the leakage level is likely less than a mA and not dangerous. But to be sure just open the breaker.
You may want to give this a read. It does cover leakage current fairly well. Whart is the concern as to leakage current? Many SSRs are a triac as you will see in the linked to PDF file. If you have concerns about your uC then focus on an opto couples SSR.
Be careful switching incandescent lamp loads, their cold resistance is much more than their hot resistance is. Whatever TRIAC or relay you use will need to handle that extra current.
Be careful switching incandescent lamp loads, their cold resistance is much more than their hot resistance is. Whatever TRIAC or relay you use will need to handle that extra current.