Lámpával megvilágítjuk a fát.

Because -val / -vel is the Hungarian suffix meaning with.

• lámpa = lamp
• lámpával = with a lamp

This suffix is often called the instrumental-comitative ending. It can mean:

• using something as a tool: késsel = with a knife
• being together with someone/something: a barátommal = with my friend

In this sentence, it shows the instrument used to illuminate the tree.

Because many Hungarian nouns ending in -a or -e change that final vowel to a long vowel before many suffixes.

So:

• lámpa → lámpá-
• then add -val
• result: lámpával

The same thing happens in many other words:

• szoba → szobában
• mese → mesét

So the long á in lámpával is a normal stem change.

megvilágítjuk means we illuminate it or we light it up.

It can be broken down like this:

• világít = to shine / to illuminate
• meg- = a verbal prefix that often gives a sense of completion, result, or lighting something up
• -juk = we in the definite conjugation

So megvilágítjuk is basically:

we illuminate it / we light it up

In this sentence, the it is a fát = the tree.

Because Hungarian uses two conjugations for many verbs:

• indefinite conjugation
• definite conjugation

Here the object is a fát = the tree, which is definite, so Hungarian uses the definite verb form.

Compare:

• megvilágítunk egy fát = we illuminate a tree
  (indefinite object → -unk)
• megvilágítjuk a fát = we illuminate the tree
  (definite object → -juk)

This is one of the most important features of Hungarian grammar.

Because fát is the accusative form of fa (tree), and the accusative marks the direct object.

• fa = tree
• fát = tree as the thing being acted on

The sentence is about what we are illuminating, so Hungarian marks fa with -t.

Also, just like with lámpa, the final a becomes long before the suffix:

• fa → fá-
• • -t
• = fát

a is the Hungarian definite article, meaning the.

So:

• a fa = the tree
• a fát = the tree (as direct object)

Hungarian has two forms of the definite article:

• a before consonant sounds
• az before vowel sounds

So:

• a fa = the tree
• az alma = the apple

Because fa begins with f, the correct article is a.

The prefix meg- often adds a sense of:

• completion
• result
• doing something successfully or fully

Without getting too technical, világít can mean shine or illuminate, while megvilágít more clearly means illuminate/light up something.

So in this sentence, meg- helps express the idea that the tree is being lit up.

This kind of prefix is very common in Hungarian verbs.

Hungarian word order is more flexible than English word order, and it often reflects topic and emphasis, not just grammar.

This sentence is natural and means something like:

With a lamp, we illuminate the tree.

Starting with Lámpával puts that instrument first, perhaps as the starting point of the sentence or as something already known in context.

Other word orders are possible, but they may sound slightly different in emphasis, for example:

• Megvilágítjuk a fát lámpával.
• A fát lámpával világítjuk meg.

These all relate to the same basic meaning, but Hungarian word order can shift what feels most prominent.

In a neutral statement, the verbal prefix usually stays attached to the verb.

So:

• megvilágítjuk = prefix + verb together

But in some sentence types, especially with strong focus or negation, the prefix can move away:

• Nem világítjuk meg a fát. = We do not illuminate the tree.
• A fát világítjuk meg. = emphasis on the tree

So the attached form here tells you the sentence is a normal, neutral affirmative statement.

A simple pronunciation guide:

• Lámpával ≈ LAAM-paa-vaal
• megvilágítjuk ≈ MEGH-vee-laa-GEET-yook
• a fát ≈ aw FAAT

A few useful pronunciation notes:

• á is a long vowel, like a longer a
• j is pronounced like English y
• gy is a soft sound, somewhat like the dy in duke for many speakers
• Hungarian stress is usually on the first syllable of each word

So the stress is:

• LÁMpával
• MEGvilágítjuk
• A fát

Yes. Hungarian often uses the present tense for future meaning when the context makes it clear.

So megvilágítjuk a fát can mean:

• we illuminate the tree
• we will illuminate the tree

The exact time depends on context.

For example:

• Most megvilágítjuk a fát. = Now we illuminate / are illuminating the tree.
• Este megvilágítjuk a fát. = In the evening we will illuminate the tree.

So present forms in Hungarian are often more flexible than in English.

It is perfectly correct and natural, but it can sound a bit more formal or descriptive than very everyday verbs like felkapcsol or phrases built around fény depending on the situation.

megvilágít is a good verb for:

• literal illumination
• technical description
• written language
• more careful speech

So this sentence is grammatically normal and clear, but depending on context, everyday Hungarian might sometimes use other wording too.