Thanks for your insight, I guess since the notches are minor should not cause problems with basic circuitry such as fluorescent blacklights, but would not advise powering complex electronics (say a CD player) using switch mode? Or of course you could use switch mode to trigger an external relay...
I recently purchased four of these and was also curious about the switch mode. I have uprated my triacs from 16 to 24A and there do not appear to be any relays in the unit, also no sound of relay switching. Today I constructed a lead tapping off ~10V using a 1M ohm and 42k ohm resistors and...