| Subject | English | French |
| el. | optical power efficiency | puissance optique efficace |
| el. | optical power efficiency | efficacité de la puissance optique |
| math. | power efficiency | puissance relative |
| stat. | power efficiency | efficacité relative (of a test) |
| stat. | power efficiency | efficacité relative d'un test |
| stat. | power efficiency | puissance d'un test (of a test) |
| transp., polit. | power efficiency | rendement énergétique |
| met. | power efficiency | rendement |
| stat. | power efficiency | puissance relative (of a test) |
| math. | power efficiency | puissance d'un test |
| comp., MS | Power Efficiency Diagnostic | Diagnostic de l'efficacité énergétique (A Wizard-based interface for maximizing battery life based on user preferences) |
| gen. | pump power efficiency | efficacité de la force de la pompe |
| antenn., opt. | source power efficiency | rendement énergétique d'une source optique |