Here's a problem to solve: Light bulbs vary in their ability to use electrical energy efficiently. Alicia compared the amount of electrical energy needed to light an incandescent bulb and a fluorescent bulb. Which units would Alicia use to compare electrical energy usage?

Among the 4 following options, which is the correct answer?

- A: newtons
 
- B: joules
 
- C: volts
 
- D: watts
 