Which component stores energy for a self-contained luminaire?

Which component stores energy for a self-contained luminaire?

• A. Transformer
• B. Capacitor
• C. Inductor
• D. Battery

Answer: (D)

A self-contained luminaire needs an energy storage device to run when not connected to mains. A battery stores chemical energy and can continuously supply electrical energy to the lamp, making the fixture truly self-contained. A transformer merely changes voltage, not stores energy. A capacitor stores energy, but only for short periods to smooth transients, which isn’t enough to power a lamp for extended time. An inductor stores energy in a magnetic field and is used mainly for filtering or energy transfer, not long-term storage. So the battery is the component that provides the stored energy for a self-contained luminaire.

A self-contained luminaire needs an energy storage device to run when not connected to mains. A battery stores chemical energy and can continuously supply electrical energy to the lamp, making the fixture truly self-contained. A transformer merely changes voltage, not stores energy. A capacitor stores energy, but only for short periods to smooth transients, which isn’t enough to power a lamp for extended time. An inductor stores energy in a magnetic field and is used mainly for filtering or energy transfer, not long-term storage. So the battery is the component that provides the stored energy for a self-contained luminaire.