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G4/GU4 LED Bulbs

Let there be light!

Whether used in table lamps, as under-cupboard lighting or in ceilings, G4 and GU4 LED bulbs make sure you’re not left dancing in the dark.

g4 led bulb

What are G4 or GU4 bulbs?

G4 and GU4 lights are low voltage lights with pin bases.

The smaller, compact versions (G4) are used in floor, table, lamps, wall and pendant lamps.

The larger versions (GU4) are usually fitted with an MR11 reflector and are often used as recessed ceiling and cupboard spotlights.

gu4 led bulb

What is the difference between G4 and GU4 LED bulbs?

Although both G4 and GU4 LED bulbs have a pin spacing of 4 mm, they’re easily confused.

The difference between the two is as follows:

  • GU4: Has a slightly thicker pin which is between 0.95 to 1.05 mm in diameter
  • G4: Has a thinner pin, measuring between 0.65 to 0.75 mm in diameter

Make sure you check the packaging before purchasing.

Are G4/GU4 LED bulbs dimmable?

Yes, but not all.

Unlike halogen bulbs, not all LED bulbs are dimmable.

To make sure you pick the right one, look out for the designated dimmable G4/GU4 LED notice on the packaging.

Unsure which LED bulbs you can dim with a dimmer? Have a question about G4/GU4 LED lights or questions on other topics related to bulbs, lights or lighting? Then our expert advice service will be pleased to help you - by telephone on +353 1 699 2138 or by using the contact form.

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