This problem baffles me completely. In one of our bedrooms, we have two floodlights connected to a one-way Z-wave dimmer switch. Both floodlights are Cree BR30s. When the light switch is off, one of the two floodlights randomly lights up very dimly. If I remove the "problematic" light, the other floodlight does not randomly light up and continues to operate normally. This leads me to believe that it can't be a problem with the light switch. I plan to install an incandescent light today to see what happens when the light types are mixed.
I don't know what else to ask, except, how is this even possible? When the floodlights were occupied by normal incandescent lights, this never happened. What sort of debugging strategy would you all recommend? Thank you!
UPDATE 1/28/2017: I finally ordered and installed the recommended dimmer switches and they work!