Yeni avize takılınca salon birden aydınlandı.

Takılınca means when it was installed / once it was put up.

It breaks down like this:

• takılmak = to be attached, to be installed, to get put on
• -ınca / -ince = when, once, as soon as

So Yeni avize takılınca... means When the new chandelier was installed...

Because takılmak is the form that fits the meaning here.

• takmak = to attach/install something
• takılmak = to be attached/installed

In this sentence, the chandelier is not the thing doing the action; it is the thing being installed. So Turkish uses takılmak.

Compare:

• Yeni avize takılınca... = When the new chandelier was installed...
• Yeni avizeyi takınca... = When someone installed the new chandelier...

The second version would imply an understood person doing the action.

-ınca / -ince creates a time clause meaning when, once, or as soon as.

So:

• gelince = when he/she comes
• bitince = when it finishes
• takılınca = when it is installed

In this sentence, it connects two events:

1. the chandelier gets installed
2. the living room suddenly becomes bright

So the meaning is: Once the new chandelier was installed, the living room suddenly brightened.

Because yeni avize is the subject of the -ınca clause, and subjects are normally in the basic form in Turkish.

• yeni = new
• avize = chandelier

Also, Turkish adjectives do not change form. So yeni stays yeni no matter what noun follows it.

Examples:

• yeni ev = new house
• yeni araba = new car
• yeni avize = new chandelier

No agreement ending is needed on the adjective.

Turkish does not have articles like English the and a/an.

So:

• avize can mean a chandelier or the chandelier
• salon can mean a living room/lounge or the living room

The exact meaning comes from context.

Here, English will usually translate it as the because the situation is specific:

• When the new chandelier was installed, the living room suddenly brightened.

Here salon means living room or lounge.

In Turkish, salon can refer to several kinds of large rooms depending on context, such as:

• living room
• hall
• salon
• lounge

In this sentence, living room is the natural meaning.

Because salon is the subject of the main clause:

• salon ... aydınlandı = the living room brightened / became illuminated

It is not a direct object, so it does not take the accusative ending.

Compare:

• Salon aydınlandı. = The living room brightened.
• Lamba salonu aydınlattı. = The lamp lit up the living room.

In the second sentence, salonu is the object, so it gets an ending.

Birden means suddenly, all of a sudden, or all at once.

So:

• salon aydınlandı = the living room brightened
• salon birden aydınlandı = the living room suddenly brightened

It adds a sense of immediacy or abrupt change.

Aydınlandı is in the simple past.

It comes from:

• aydınlanmak = to brighten, to become illuminated
• aydınlandı = it brightened / it became illuminated

Breakdown:

• aydınlan- = verb stem
• -dı / -di / -du / -dü = past tense
• third person singular has no extra personal ending here

So salon birden aydınlandı = the living room suddenly became bright.

Because the sentence describes the room undergoing a change, not a person actively doing something to it.

• aydınlanmak = to become bright, to light up
• aydınlatmak = to brighten something, to illuminate something

So:

• Salon aydınlandı. = The living room brightened.
• Yeni avize salonu aydınlattı. = The new chandelier illuminated the living room.

Both are possible in Turkish, but they focus on different things. The original sentence focuses on the result in the room.

There are effectively two parts:

1. Yeni avize takılınca

   • subject: yeni avize
   • meaning: when the new chandelier was installed

2. salon birden aydınlandı

   • subject: salon
   • meaning: the living room suddenly brightened

So the sentence shifts from one subject to another:

• first: the new chandelier
• then: the living room

That is very normal in Turkish.

The given word order is natural and neutral:

• Yeni avize takılınca salon birden aydınlandı.

Turkish word order is flexible, but changes in order can shift emphasis.

For example:

• Salon yeni avize takılınca birden aydınlandı.

This is still understandable, but the original version sounds more straightforward because the when-clause comes first.

A common pattern in Turkish is:

[time/condition clause] + [main clause]

So this sentence follows a very typical structure.

Yes, depending on context, -ınca / -ince can sometimes sound like:

• when
• once
• after

Here, natural English translations include:

• When the new chandelier was installed, the living room suddenly brightened.
• Once the new chandelier was installed, the living room suddenly brightened.
• After the new chandelier was installed, the living room suddenly brightened.

The Turkish form itself does not force a huge difference here; context and translation style decide what sounds best in English.