A LED-izzó energiahatékony.

In Hungarian, the verb van (to be / is) is usually left out in the present tense, third person when the predicate is a noun or an adjective.

So:

• A LED-izzó energiahatékony.
• literally: The LED-bulb energy-efficient.

This is completely normal Hungarian.

You would use a form of to be in other situations, for example:

• A LED-izzó energiahatékony volt. = The LED bulb was energy-efficient.
• A LED-izzó energiahatékony lesz. = The LED bulb will be energy-efficient.
• A LED-izzó energiahatékony? = Is the LED bulb energy-efficient?

Here a is the definite article, so it normally means the.

Hungarian has:

• a / az = the
• egy = a / an

So:

• A LED-izzó = the LED bulb
• Egy LED-izzó = an LED bulb

However, Hungarian sometimes uses the definite article in more general statements too, especially when talking about a type of thing as a class. So depending on context, English might translate it as either:

• The LED bulb is energy-efficient or
• An LED bulb is energy-efficient

But grammatically, a itself is the definite article.

Hungarian chooses a or az based on the sound that follows:

• a before a consonant sound
• az before a vowel sound

LED here is pronounced with an initial l sound, which is a consonant, so Hungarian uses a:

• a LED-izzó

If the next word began with a vowel sound, you would use az instead.

The hyphen is there because Hungarian often writes compounds with a hyphen when the first element is an abbreviation, acronym, or letter-based form.

So:

• LED-izzó = LED bulb
• similar pattern: TV-műsor, CD-lemez

The hyphen makes the compound easier to read and is standard spelling.

Yes, in everyday Hungarian izzó commonly means light bulb.

Historically, it is related to a verb meaning to glow / to burn, so the word originally has a connection with glowing or incandescent light. But in modern everyday use, izzó is the normal word for a bulb.

So:

• LED-izzó = LED bulb
• villanykörte is another common word for light bulb in general

Depending on context, both may be used, but LED-izzó is a very natural way to say LED bulb.

Because in this sentence it is not just describing the noun inside the noun phrase; it is the predicate of the sentence.

Compare:

• energiahatékony LED-izzó = an energy-efficient LED bulb
  
  • here the adjective comes before the noun, like in English
• A LED-izzó energiahatékony. = The LED bulb is energy-efficient.
  
  • here the adjective comes after the noun because it is the main statement about the subject

So the sentence structure is:

• A LED-izzó = the subject
• energiahatékony = the predicate adjective

It is a compound adjective:

• energia = energy
• hatékony = efficient / effective

So energiahatékony means literally something like energy-efficient.

Hungarian forms many long compound words this way, so this is very normal. If you are learning vocabulary, it can help to spot the parts inside longer words.

Yes, often you can.

Both are common, but there is a slight difference in nuance:

• energiahatékony = energy-efficient
• energiatakarékos = energy-saving / economical in energy use

In many everyday contexts, especially with appliances or bulbs, both can sound natural. But energiahatékony is often a bit closer to the technical idea of efficiency.

So these are both possible:

• A LED-izzó energiahatékony.
• A LED-izzó energiatakarékos.

Normally, no. In a full standard sentence, you would usually keep the article:

• A LED-izzó energiahatékony.

Leaving out the article would sound unnatural in ordinary neutral Hungarian. Article omission can happen in special styles, headlines, labels, or very telegraphic language, but not as the normal sentence pattern here.

The plural would be:

• A LED-izzók energiahatékonyak. = The LED bulbs are energy-efficient.

Notice two changes:

• izzó → izzók = bulb → bulbs
• energiahatékony → energiahatékonyak = energy-efficient → energy-efficient (plural predicate form)

Hungarian predicate adjectives often take plural marking when the subject is plural.

Yes, Hungarian word order is flexible, and changing it often changes the focus or emphasis.

Neutral statement:

• A LED-izzó energiahatékony.

If you want to emphasize the property, you could say:

• Energiahatékony a LED-izzó.

That still means roughly the same thing, but now energy-efficient is in focus. So the basic meaning stays similar, while the information structure changes.

A few useful points:

• izzó has a long ó
• energiahatékony has long é and ó
• double zz means a longer consonant sound than a single z

A rough guide:

• izzó ≈ iz-zoh
• energiahatékony ≈ e-ner-gi-a-ha-tay-kony

Also remember that Hungarian stress normally falls on the first syllable of the word:

• Íz-zó
• E-nergiahatékony

The spelling is very regular in Hungarian, so once you know the sound values, pronunciation becomes much easier than in English.