Kafa lambası kaçış yolunu aydınlatıyor.

A useful word-by-word parse is:

• kafa = head
• lambası = lamp with the compound ending
• kaçış = escape
• yolunu = route/path with extra endings
• aydınlatıyor = is illuminating / is lighting up

So the structure is:

• Kafa lambası = headlamp
• kaçış yolunu = the escape route
• aydınlatıyor = is illuminating

Because Turkish often makes noun compounds by putting two nouns together, and the second noun usually takes a special ending.

So:

• kafa = head
• lamba = lamp
• kafa lambası = headlamp

That -sı does not mean literal possession here. It is the normal way many Turkish compound nouns are formed.

Other similar examples:

• diş fırçası = toothbrush
• otobüs durağı = bus stop
• kaçış yolu = escape route

So kafa lambası is a standard compound noun.

It looks possessive at first, but in this sentence it is better understood as a compound noun, not as the lamp of the head in a literal ownership sense.

Turkish uses the same kind of form for many compounds, so English speakers often think it must be possessive. Grammatically, the second noun carries a suffix that resembles possessive marking, but the whole expression functions like one lexical item: headlamp.

So here, think:

• kafa lambası = headlamp

not

• the lamp belonging to the head

Kaçış is a noun meaning escape.

It comes from the verb:

• kaçmak = to escape, run away

Turkish can make action nouns from verbs with endings like -ış / -iş / -uş / -üş.

So:

• kaçmak = to escape
• kaçış = escape

Then:

• kaçış yolu = escape route / escape path

Because kaçış yolu is the direct object of the verb, and it is specific/definite.

The verb aydınlatmak means to illuminate something, so the thing being illuminated is the object. In Turkish, a specific direct object usually takes the accusative ending.

Base form:

• kaçış yolu = escape route

As a definite object:

• kaçış yolunu = the escape route

So the ending helps show that the sentence is talking about a particular route, not just any route.

Because there are actually two endings there.

Start with:

• yol = road, path, route

In the compound:

• kaçış yolu = escape route

the word yol already has the compound/possessive-type ending -u.

Then Turkish adds the accusative ending because it is a definite object. After this kind of ending, Turkish uses a linking n before the case suffix.

So:

• yol
• yol-u
• yol-u-nu

That n is a normal linking consonant here. It is not part of the root.

Aydınlatıyor comes from:

• aydınlatmak = to illuminate, to light up something

The form -ıyor is the present continuous suffix.

So:

• aydınlatıyor = is illuminating, is lighting up

Depending on context, Turkish present continuous can sometimes also sound like English illuminates, but the most direct match here is is illuminating.

Because aydınlatmak is transitive: it takes an object.

• aydınlatmak = to illuminate something
• aydınlanmak = to become illuminated / to become enlightened

In this sentence, the headlamp is doing something to kaçış yolunu. Since there is a direct object, Turkish uses the transitive verb:

• Kafa lambası kaçış yolunu aydınlatıyor.

If you used aydınlanıyor, the meaning would shift to something like is becoming illuminated, which does not fit this structure.

The most neutral order in Turkish is usually:

• Subject + Object + Verb

So this sentence is very normal:

• Kafa lambası kaçış yolunu aydınlatıyor.

Turkish word order is flexible, though. You can move parts around for emphasis:

• Kaçış yolunu kafa lambası aydınlatıyor.

This still means roughly the same thing, but it puts more focus on kaçış yolunu.

For a learner, the given order is the safest and most natural one to copy.

Turkish does not have separate words exactly like English a and the.

Instead, definiteness is often understood from:

• context
• word order
• case endings

Here, kaçış yolunu has the accusative ending, which strongly suggests a specific object, so it often corresponds to the escape route.

Kafa lambası could be understood as the headlamp or a headlamp, depending on context. Turkish leaves that more open unless something else in the sentence makes it clear.