Depende sa device at dapat naiintindihan mo how it works to believe it.. Meron dati yung kinakabit sa motorized appliances that help in correcting the phase (in or outphase) para hindi wasted into heat ang off-phase energy..operated by TRIAC power transistor and phase preamplifier..

Meron pa nyan yun kinakabit sa earth ground parang ballast pero wala din silbe..Mostly yun bnebenta ngayon energy saving device decoration lang. Better spend/invest on solar power or install earth ground sa home wiring to protect devices from static..