Palms off bulbs (5)
I believe the answer is:
lamps
'bulbs' is the definition.
(I know this)
'palms off' is the wordplay.
'off' is an anagram indicator.
'palms' with letters rearranged gives 'LAMPS'.
(Other definitions for lamps that I've seen before include "Lights" , "Devices for giving light" , "light fittings" .)