Jeg må få fikset lysbryteren, for den er ødelagt.

I have to get the light switch fixed, because it is broken.

Breakdown of Jeg må få fikset lysbryteren, for den er ødelagt.

• jeg: I
• være: to be
• den: it
• for: because
• måtte: have to
• lysbryteren: the light switch
• ødelagt: broken
• få fikset: to get fixed

Questions & Answers about Jeg må få fikset lysbryteren, for den er ødelagt.

What does må imply here—strong obligation or just “need to”?

Må usually expresses a fairly strong necessity/obligation: “must / have to.” In everyday speech it can also mean “need to” in a practical sense. In Jeg må få fikset lysbryteren, it’s typically “I need to get the light switch fixed” (practical necessity), not moral obligation.

Why is it få fikset instead of just fikse?

Å få + past participle is a common Norwegian construction meaning “to get something done / have something done (by someone).”
So Jeg må få fikset lysbryteren = “I must get the light switch fixed” (often implying you’ll arrange for someone else to do it, like an electrician).
If you say Jeg må fikse lysbryteren, that more directly implies you will fix it yourself.

Is fikset a past tense verb here?

No. Fikset here is a past participle used after få in the “get something done” structure. It functions more like an adjective/participle than a simple past tense.
Comparable pattern: Jeg fikk reparert bilen = “I got the car repaired.”

Do I need å (the infinitive marker) anywhere in this sentence?

Not here. After modal verbs like må, Norwegian typically uses the bare infinitive without å: må få (not må å få).
Also, the få + participle pattern doesn’t use å before the participle: få fikset, not få å fikse.

What’s the difference between lysbryteren and en lysbryter?

En lysbryter is indefinite: “a light switch.”
Lysbryteren is definite: “the light switch.”
In this sentence you’re referring to a specific switch (probably the one in your home that’s broken), so the definite form -en is used.

Why does Norwegian attach the to the noun (lysbryteren) instead of using a separate word?

Norwegian commonly marks definiteness with a suffix on the noun:

• en lysbryter = “a light switch”
• lysbryteren = “the light switch”
  This is a core feature of Norwegian grammar (definite suffixes).

Why is there a comma before for?

Because for here means “because/for” and introduces a new clause: for den er ødelagt. In Norwegian, it’s normal to place a comma before coordinating conjunctions like for when they connect two clauses with their own verbs:
Jeg må få fikset lysbryteren, for den er ødelagt.

Could for be replaced with fordi? Would the word order change?

Yes. Fordi is also “because,” and it’s very common. With fordi, many speakers keep normal word order, but it’s also common to use subordinate-clause word order. You’ll see both, though the subordinate pattern is often taught as standard:

• Common in speech: ... fordi den er ødelagt.
• Also possible/standard subordinate order: ... fordi den er ødelagt. (same here because there’s no adverb to move)
  If you add an adverb, you can see the difference:
• Main-clause order after for: for den er helt ødelagt
• Subordinate order after fordi: fordi den er helt ødelagt (still looks the same here; with negation it’s clearer: fordi den ikke er ...)

Why does it say den? What does it refer to?

Den is “it” for a common-gender noun, and it refers back to lysbryteren. Norwegian often uses a pronoun like this to avoid repeating the noun:
... lysbryteren, for den er ødelagt = “... the light switch, because it is broken.”

What does ødelagt mean grammatically—adjective or verb?

Ødelagt is the past participle of å ødelegge (“to destroy/break”), but in this sentence it functions as an adjective meaning “broken/damaged.”
Pattern: Den er ødelagt = “It is broken.”

Is fikse a “real” Norwegian word, or is it informal?

Fikse is very common and widely accepted in modern Norwegian (originally influenced by English “fix”). It can feel a bit informal compared to alternatives like reparere (“repair”) or ordne (“sort out/arrange”), but it’s perfectly normal in everyday speech:

• få fikset = get fixed
• få reparert = get repaired (a bit more formal/technical)

Are there other natural ways to say the same thing in Norwegian?

Yes, a few common alternatives depending on nuance:

• If you will fix it yourself: Jeg må fikse lysbryteren, den er ødelagt.
• More formal/technical: Jeg må få reparert lysbryteren, for den er ødelagt.
• Emphasize urgency/necessity: Jeg må virkelig få fikset lysbryteren...
  All are natural; må få fikset strongly suggests arranging a fix (often by someone else).