رجعت الكهربا بعد شوي، وصار في ضو بالغرفة.

A rough Levantine pronunciation is:

rijʿet il-kahraba baʿd shwayy, w ṣār fī ḍaw bil-ghurfe

A few useful sound notes:

• ع in رجعت and بعد is the deep throat sound ʿ
• ض in ضو is a heavy/emphatic d sound, written here as ḍ
• غ in غرفة is like a French or German-style r, written here as gh
• ة at the end of غرفة is usually pronounced -e in Levantine, so ghurfe

Different Levantine regions will pronounce parts of it a little differently, but this is a good general guide.

Both are possible, but verb + subject is very common in Arabic, especially in narration:

• رجعت الكهربا = the electricity came back
• الكهربا رجعت = the electricity came back

The second version puts a little more focus on the electricity itself. The version in your sentence sounds very natural for telling what happened next in a situation.

Because the subject الكهربا is grammatically feminine.

In Levantine, كهربا means electricity/power, and it is treated as a feminine noun. So the past tense verb agrees with it:

• رجع = he came back / it came back masculine
• رجعت = she came back / it came back feminine

So:

• رجعت الكهربا = the electricity came back

Even though electricity is not a person, Arabic still gives nouns grammatical gender, and the verb follows that.

الكهربا is the everyday Levantine form, while الكهرباء is the Modern Standard Arabic form.

So:

• الكهربا = colloquial Levantine
• الكهرباء = MSA

The meaning is the same: electricity or electrical power. In this kind of sentence, it usually means the power supply came back on.

بعد شوي is a very common colloquial expression meaning:

• after a little while
• a bit later
• shortly afterward

Breakdown:

• بعد = after
• شوي = a little / a bit

So literally it is something like after a little bit, but idiomatically it means after a short time.

This is a very common Levantine pattern.

• صار literally means became or happened
• في can function existentially, like there is / there was

So:

• صار في ضو literally = there became light
• natural English = there was light / light appeared

It often introduces a new situation or state. Compare:

• في ضو = there is light
• صار في ضو = there came to be light / there was now light

So صار adds the idea of a change: before there was no light, then there was.

Yes. ضو is the colloquial Levantine form of ضوء.

Both mean light, but:

• ضو = everyday spoken Levantine
• ضوء = MSA spelling/pronunciation

So in this sentence:

• صار في ضو بالغرفة = there was light in the room

You may also hear نور, which can also mean light, but ضو is very natural here for physical light.

Because في + noun in this kind of existential structure usually introduces something indefinite:

• في ضو = there is light
• صار في ضو = there came to be light

This sounds natural because it is talking about the presence of light, not a specific previously identified light.

If you said الضو, it would sound more definite and context-dependent, like the light as a specific known thing.

بالغرفة is made of three parts:

• بـ = in
• ال = the
• غرفة = room

So:

• بالغرفة = in the room

In pronunciation, بـ + ال often becomes bil-, so you hear:

bil-ghurfe

This kind of attachment is very normal in Arabic. Prepositions like بـ, لـ, and كـ usually attach directly to the following word.

و simply means and.

So the sentence has two linked events:

• رجعت الكهربا بعد شوي = the electricity came back after a little while
• وصار في ضو بالغرفة = and there was light in the room

In Arabic, و is used very frequently to connect actions in a natural sequence, especially in storytelling.

A more MSA-like version could be:

عادت الكهرباء بعد قليل، وأصبح هناك ضوء في الغرفة.

Or slightly closer to the original wording:

رجعت الكهرباء بعد قليل، وصار هناك ضوء في الغرفة.

Main differences:

• الكهربا becomes الكهرباء
• شوي becomes قليل
• colloquial existential في is often replaced by هناك in formal writing
• the whole sentence sounds more formal and less conversational

Your original sentence is clearly natural spoken Levantine.