| Subject | English | French |
| comp., MS | directional light | lumière directionnelle (A light source that is attached to a frame but appears to illuminate all objects with equal intensity, as if it were at an infinite distance from the objects. Directional light has orientation but no position, and it is commonly used to simulate distant light sources, such as the sun) |
| earth.sc. | directional light | éclairage directionnel |
| el. | directional light source | source lumineuse dirigée |
| el. | directional lighting | éclairage dirigé |
| transp., el. | light bulbs for directional signals for vehicles | ampoules d'indicateurs de direction pour véhicules |