Glow-when-off is not paranormal

Filament-era dimmers on sale racks refuse retirement quietly. Voltage spike harmonics flirt with routers two rooms away — distinct from inverter scheduling or carpenter shelf depth debates.

Physics in one impatient paragraph

Phase-cut dimmers choke sine waves; LED drivers crave stable DC references. Marriage requires compatible dimming curves or you inherit strobe migraines at 20% commanded brightness.

Shopping folklore to distrust

“Universal LED dimmer” badges on cardboard without minimum load watts.
Dump resistors taped behind plaster as minimum-load theatre — heat goes somewhere eventually.
Mixing MU switching loops feeding fans + lights on borrowed neutrals.

Why booking electricians still matters

Neutral integrity tests and segregation rules beat AliExpress bravery. Mention dimmer SKU and luminaire SKU in booking notes.

Power quality neighbours: monsoon trip cues

Book lighting circuit review

Hub