From Bret Cahill@21:1/5 to All on Sat Jan 2 08:10:45 2021
The 220 v EU in-cord power supply does the same thing as the 110 v U. S. Only the plug to the wall socket is different. If you jumper a 220 PS to a 110 outlet you get almost the same DC and AC outputs as a 110 power supply plugged into 110.
The string or rope parts must be designed around the 2 different voltages. The 220v and 110 v rope parts look alike and have mechanically interchangeable internal plugs to the power supply but they require different voltages to operate as intended.
If you plug a 220 rope into a 110 power supply (or 220 power supply spliced onto as U.S. plug) and plug that into 110 you'll only get maybe 8% of the lumens as if you plugged it into 220. This appears as about a third of the brightness to the yuman eye
but it may last longer.
If you plug the 110v rope and PS into 220v it'll probably be really bright for a few seconds before it burns out.
About 2/3 eds of the 110 rope LEDs, constantly on, burned out in 6 months on 110 so for a night light it maybe better to buy the cheaper EU rope, ~ $2 /m w/o plug, and plug into the old 110 PS.
Rope lights flash with the AC cycle so there's been no attempt to filter smooth the DC if that is what is powering the lights.