Komodinin üstündeki gece lambası hâlâ açık.

Because it is in the genitive case, which often corresponds to of the ... in English.

• komodin = nightstand / bedside table
• komodinin = of the nightstand

In this sentence, Turkish is building the expression:

• komodinin üstü = the top of the nightstand
• komodinin üstündeki ... = the ... that is on top of the nightstand

So -in marks komodin as the thing that the top belongs to.

Üstündeki is made from several pieces:

• üst = top, upper side
• üstü = its top / the top of it
• üstünde = on it / on its top
• üstündeki = the one that is on it / the one on top of it

So in this sentence:

• komodinin üstündeki gece lambası = the night lamp that is on top of the nightstand

The ending -ki turns the location phrase into something like an adjective. It lets Turkish say the lamp on the nightstand without using a separate relative pronoun like that or which.

Because this is a very common Turkish noun compound.

• gece = night
• lamba = lamp
• gece lambası = night lamp / bedside lamp / nightlight

The ending -sı is the typical third-person compound marker. You see this pattern a lot in Turkish:

• çay bardağı = tea glass
• araba kapısı = car door
• yatak odası = bedroom

So gece lambası is the normal way to say night lamp.

This is how Turkish commonly forms a compound where one noun modifies another.

The structure is:

• first noun: gece
• second noun: lamba
• compound form of second noun: lambası

The -sı here is not exactly the same as English possession, even though it looks similar. It is just the standard compound form.

Also, the s is a buffer consonant. Since gece ends in a vowel and the ending begins with a vowel, Turkish inserts s to make pronunciation smoother:

• lamba + ı would be awkward
• so Turkish uses lambası

Hâlâ means still.

So:

• gece lambası hâlâ açık = the night lamp is still on

Its position is natural because Turkish often places adverbs like hâlâ before the predicate:

• açık = open / on
• hâlâ açık = still open / still on

You could move hâlâ for emphasis in some contexts, but this placement is very standard.

Yes, açık literally means open, but in Turkish it is also used for things that are on, especially lights, TVs, radios, and similar devices.

So:

• Lamba açık. = The lamp is on.
• Televizyon açık. = The TV is on.

The opposite is kapalı:

• Lamba kapalı. = The lamp is off.

This is very natural in Turkish, even though English usually says on/off instead of open/closed.

Because Turkish normally puts modifiers before the noun they describe.

In English, we often say:

• the night lamp on the nightstand

In Turkish, the descriptive part comes first:

• komodinin üstündeki gece lambası

Literally, this is something like:

• the-on-the-nightstand night lamp

That may feel backward to an English speaker, but it is a very normal Turkish pattern.

Not with the same meaning.

• Komodinin üstündeki gece lambası hâlâ açık.
  = The night lamp on the nightstand is still on.

Here, komodinin üstündeki describes which lamp.

But:

• Komodinin üstünde gece lambası ...

starts to sound like On the nightstand, a night lamp ..., where üstünde is just a location phrase, not a modifier built with -ki.

So üstündeki is important because it links the location directly to gece lambası as an identifying description.

Turkish does not have a definite article like English the.

Whether something means a or the depends on context.

So:

• gece lambası can mean a night lamp or the night lamp
• komodinin üstündeki gece lambası is naturally understood as the night lamp on the nightstand, because the description makes it specific

Turkish often relies on context and structure instead of articles.

In the present tense, Turkish often leaves out the verb to be when describing a state.

So:

• Gece lambası açık. literally looks like Night lamp open
• but it means The night lamp is on

Likewise:

• Ev büyük. = The house is big.
• Hava soğuk. = The weather is cold.

So in Komodinin üstündeki gece lambası hâlâ açık, the meaning is is understood automatically.

The sentence is:

• Komodinin üstündeki gece lambası = subject
• hâlâ = adverb
• açık = predicate

So the overall order is:

subject + adverb + predicate

This is very common in Turkish. Also, Turkish often places the main predicate at the end of the sentence, which is exactly what happens here with açık.

The circumflex in hâlâ helps distinguish it from hala.

• hâlâ = still
• hala = paternal aunt

It can also suggest a slightly longer or clearer vowel in careful writing and pronunciation. In everyday typing, many people omit the circumflex, but in standard writing it is useful because it prevents confusion.

In many contexts, yes, komodin is best understood as nightstand or bedside table.

Depending on context, it can also refer to a small chest or cabinet, but when you see:

• komodinin üstündeki gece lambası

a learner should usually understand it as something like:

• the night lamp on the nightstand

because that is the most natural real-world pairing.