GU10, MR16 and G4 LED Bulbs: Direct Replacement for Spotlights and Recessed Downlights
GU10 LED dichroic bulbs are the most common solution for renewing spotlights and recessed downlights without building work. This type of bulb replaces traditional halogens with lower energy consumption. The luminous flux stays high and the energy saving is noticeable from the first bill.
GU10 LED bulbs coexist in the same lighting system with low-voltage MR16 and G4 bulbs. Choosing the right cap avoids mistakes.
How to tell which cap you have: GU10, MR16 or G4
Main differences and how to recognise them
The GU10 MR16 G4 pin cap is recognised by the number and thickness of the pins on the base. The GU10 turns a quarter turn and is used in recessed LED spotlights.
The MR16 12V low-voltage LED bulb needs a transformer. The small 12V G4 LED bulb is the most compact and is suitable for LED table lamps.
Key parameters for getting your purchase right
Beam angle according to distance and intensity
The 24 36 60 degree beam angle determines how the light is spread. A GU10 LED bulb with a 24 degree angle concentrates the light intensity in a narrow spot, ideal for accent lighting over pictures or objects.
Wider angles spread the light intensity over a broad area, for general ceiling lighting.
High CRI for accent lighting in shops and jewellers
CRI colour fidelity measures how real colours look. A CRI98 GU10 LED dichroic bulb for jewellers shows the real colours of stones and metals without distortion, and improves the quality of the light.
CRI colour rendering also matters in a GU10 LED dichroic bulb for shop windows, where every garment must be seen in its exact colour.
It fits your current spotlights and downlights
Check that the model is a recessed downlight compatible with your ring. The GU10 LED dichroic bulb for track lighting works in track spotlight systems compatible with shops.
The GU10 LED bulb for downlights fits the same trim without tools. With a dimmer switch at home, choose a dimmable GU10 LED bulb that is dimmable and compatible with your mechanism.
Also discover our section of [track spotlights] and [downlight rings] compatible with GU10.
Direct replacement without touching the luminaire
The halogen to LED equivalence makes it easy to choose the right wattage. The GU10 halogen to LED equivalence puts a 5W to 7W dichroic bulb on a par with 50W halogen spotlights in kitchens and living rooms.
Replacing traditional halogens with LED does not require changing the luminaire. A high-luminosity 8W GU10 LED dichroic bulb gives more lumens with fewer watts.
The quality Osram Samsung chip gives a longer service life to the dichroic bulb. A GU10 Osram Samsung LED dichroic bulb keeps its performance after thousands of hours.
Compare the GU10 LED dichroic bulb price against the cost of halogens that blow often. Flicker-free operation avoids flickering when dimming, and a flicker-free GU10 LED dichroic bulb protects your eyes.
A flicker-free GU10 LED bulb keeps the light stable at low intensity. With a selectable colour CCT GU10 dichroic bulb you choose between neutral white for work or warm, welcoming tones for relaxing. Choose the type of product that best fits each room.
Frequently asked questions about GU10, MR16 and G4 LED dichroic bulbs
How do I tell whether I have a GU10 or MR16 cap?
The GU10 has a wide base and turns a quarter turn. The MR16 uses two thin pins and needs a 12V transformer.
What beam angle do I need for accent lighting?
To highlight an object a 24 degree angle is best. For the ceiling a 60 degree angle is better.
Are GU10 dichroic bulbs dimmable with any dimmer?
No. Only models marked as dimmable work with a conventional dimmer.
Why does my LED dichroic bulb flicker when I dim it?
Flickering is usually caused by a dimmer that is not LED compatible. Switching to a flicker free model solves the problem in most cases.
What CRI do I need for a shop window or jeweller's?
A CRI of 90 or above is recommended, up to 98 in jewellers. A high CRI shows the real colours of each piece.
What halogen wattage is a GU10 LED equivalent to?
A 5W GU10 LED is roughly equivalent to a 50W halogen. Check the conversion table before buying to get the wattage right.