KC868-D16 all tested light bulbs are flickering

[admin]

we have tested, if work with dimmable LED lamp, it will have compatibility issue.
but if we use tungsten lamp, it's ok. see this photo. we have bought some different power lamp.
But i think the SSR compatibility is not very good. 
now we are designing a new PCB for testing, we need wait the result, maybe need 2-3 weeks will have result. if you want buy some SSR in your local city, you can also buy some SSR for testing.