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2W 4000K G4 LED bulb 12V 150lm, dimmable
2.5W 4000K G4 LED bulb 12V, 220lm, dimmable
1.2W 4000K G4 LED bulb 12V 80lm, dimmable
2.5W 3000K G4 LED bulb 12V, 220lm, dimmable
2W 3000K G4 LED bulb 12V 150lm, dimmable
1.2W 3000K G4 LED bulb 12V 80lm, dimmable
2.8W 2700K GU4 MR11 small spot 184lm, dimmable
G4 2.5W LED bulb 12V - 3000K-4000K-6000K SWITCH, 250lm (large size 45x17mm)
4.5W 2700K GU4 MR11 mini spot 345lm, dimmable
G4 LED bulb 12 V – how to choose a halogen replacement
The guide below helps you compare product features and avoid the most common selection mistakes.
G4 base and bulb dimensions
G4 is a compact two-pin lamp base used, for example, in cabinet and decorative light fittings. A matching base alone is not enough: an LED bulb may be longer or wider than the old halogen. Measure the interior of the light fitting and check the bulb's technical drawing before buying.
12 V AC or DC?
G4 bulbs can have different supply voltage requirements. Check whether the chosen model is designed for 12 V AC, DC or both. An old halogen system may have an electronic transformer whose minimum load is higher than the power consumption of the LED bulb. In that case the bulb may flicker, switch off or fail to light up.
Light output and colour temperature
Compare the replacement bulb by its lumen value, beam angle and colour temperature. Wattage alone does not tell you what the light will look like. Warm white often suits a cosy interior, while a more neutral tone is better for more detailed work. Also take into account whether the light fitting has an enclosed design and the operating temperature limits of the bulb.
Dimming and replacing the power supply
Not all G4 LED bulbs are dimmable. If the light fitting has a dimmer, check the compatibility of the bulb, the transformer and the dimmer. If the old halogen transformer is not suitable for a small LED load, choose a 12 V LED power supply suited to the application. Changes to fixed electrical installations must be carried out by a professional.
Compatible products and accessories
Always check the model-specific dimensions and compatibility in the product information. Also have a look at the following options:
Frequently asked questions
Can a G4 halogen be replaced directly with an LED?
Often yes, if the base, dimensions, voltage and transformer load are compatible.
Why does a G4 LED flicker?
The old halogen transformer may have too high a minimum load, or the dimming may not be suitable for an LED bulb.
Is a G4 LED always 12 V?
Always check the markings of the chosen bulb and the permitted supply voltages.
How can I tell how bright a bulb is?
Compare the lumen value, beam angle and colour temperature in the product information.
