A one watt lightbulb, for example, will change one joule of electrical energy into light energy (and some heat/sound) every second.
(A one watt lightbulb; will change; one joule of electrical energy; into light energy (and some heat/sound; T:every second)
A one watt lightbulb
will change
one joule of electrical energy into light energy (and some heat/sound T:every second