Thhis is the basic vanilla plug in lamp module. Used to be called the LM465. Can't kill it, works well. On the other hand X10 has had 20 yours to get it right.

Note that this is a 2 pin unit, so no ground

Interesting issue with these units is when LEDS are involved. When the unit is turned off, power bleeds through and will power up the LEDS, because LEDS need little power This is achieved by the fact that the PLM01 is a 24/7 receiver, consumes a standby power of 7 watts. Thats whats powering your leds