vs
QUICK ANSWER
"Semáforo" is a noun which is often translated as "traffic light", and "luz" is a noun which is often translated as "light". Learn more about the difference between "semáforo" and "luz" below.
el semáforo(
seh
-
mah
-
foh
-
roh
)A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
1. (automobile)
b. stoplight (United States)
Regionalism used in the United States
Hay un semáforo adelante.There's a stoplight up ahead.
2. (nautical)
3. (railroad)
a. signal
El semáforo estaba en verde y el tren pasó a toda velocidad.The signal was green and the train sped on.
la luz(
loos
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
1. (luminosity)
a. light
La luz del farol entraba por la ventana e iluminaba el cuarto.The light from the streetlight came in through the window and illuminated the room.
2. (device)
a. light
Si enciendes la luz, podrás ver dónde estás.If you turn on the light, you'll see where you are.
3. (power)
