Strange: X-10 outlets & LED Holiday Lights

[Eric <ericw2000@xxxxxxxxx>]

I have two Leviton 6227W outlets outside my house which have been used for
years to operate our holiday lights. Yesterday I put up new lights, those
LED holiday lights instead of our usual C7 lights. Everything works fine so
far.

When I came home, the outlets have switched off from the timer, and the LED
lights continue to glow faintly, maybe 10% of their full brightness. When I
unplug the lights, they go out completely. When I plug them back in the
relay trips and the come on full, as they're supposed to.

Is still low voltage present to operate the relay, or did I wire these
incorrectly?