Philips Downlight LED Ledinaire SlimDownlight DN065C G4 LED20/840 19W 8-D225 220-240V
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19W
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2000lm
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4000K
19,95
G4 12V
G4 lamps, also known as G4 pin lamps or mini spots, are recognized by their small size and the two pins spaced 4 millimeters apart. They operate at 12 Volts (low voltage), making them ideal for fixtures with limited space. You'll find them everywhere: from accent lighting in display cabinets, recessed spotlights in furniture, and extractor hoods, to lighting in caravans and campers. Thanks to their compact design, G4 lamps are perfect for highlighting specific elements or for subtle general lighting.
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Switching to LED G4 Lamps: A Smart Choice
Traditional halogen G4 lamps have been phased out in Europe since September 2023. This marks a logical transition to the more energy-efficient LED alternatives. The benefits of LED G4 lamps are significant, making them an attractive replacement for outdated halogen models.
Comparison: Halogen G4 vs. LED G4
| Property | Halogen G4 | LED G4 |
|---|---|---|
| Energy Consumption | High | Up to 90% lower |
| Lifespan | Average 2,000 - 4,000 hours | At least 15,000 hours (up to 50,000 hours or more) |
| Environmental Friendliness | Contains mercury | Mercury-free |
| Instant Light Output | Not always full brightness immediately | Immediate full brightness |
| Heat Generation | Significant | Minimal |
| Color Temperature | Limited (mostly warm white) | Multiple options (very warm white to cool white) |
Switching to LED G4 lamps not only delivers immediate energy savings but also reduces the frequency of replacement and the impact on the environment.
Essential Technical Considerations for G4 12V Lamps
When selecting and installing G4 12V lamps, particularly LED variants, some technical details must be observed to ensure optimal performance and to avoid potential issues.
Transformer: Essential for 12V Lighting
G4 12V lamps operate on low voltage and cannot be connected directly to the main power supply (230V). A transformer is required to convert the voltage from 230V to 12V. It is important to check whether your existing transformer is compatible with LED lighting. Older halogen transformers often struggle with the lower minimum load of LED lamps, which can cause flickering or improper functioning of the lamps. For stable and reliable operation, it is recommended to use a specific LED transformer designed for the lower wattages of LED lamps.
As a general rule for installers: always verify both the minimum and maximum load of the transformer. The total wattage of the connected LED lamps should be within this range, ideally with a small margin to accommodate inrush currents.
Dimming G4 LED Lamps: Key Points
Not all G4 LED lamps are dimmable. If you want to adjust the light intensity, specifically choose dimmable G4 LED lamps. Additionally, a suitable dimmer—a LED dimmer—and a dimmable transformer are required. A standard (halogen) dimmer or non-dimmable transformer can cause flickering, buzzing, or even premature failure of the LED lamp. Always consult the lamp specifications and the manufacturer's recommended dimmers and transformers.
Dimensions and Fit
Although the G4 base is standardized with a pin distance of 4 millimeters, the physical dimensions (diameter and length) of G4 LED lamps may differ slightly from traditional halogen G4 lamps due to integrated LED components. It is advisable to check the exact dimensions of the new LED lamp before purchase and compare them with the available space in your fixture to prevent the lamp from not fitting.
Lumen and Color Temperature
With LED lighting, light output (brightness) depends on the number of lumens, not the wattage. For example, a 1.2W G4 LED lamp can match the light output of a 10W halogen lamp. Therefore, pay attention to the lumen value when replacing bulbs. Color temperature, expressed in Kelvin (K), determines the ambiance of the light. Common options for G4 LED include:
- 2700K (Very Warm White): For a cozy, intimate atmosphere in living rooms or bedrooms.
- 3000K (Warm White): A generally pleasant color suitable for most rooms.
- 4000K (Cool White): Ideal for workspaces or kitchens where functional, bright light is desired.
G4 vs. GU4 Lamps: Understanding the Difference
While G4 and GU4 lamps are both 'mini spots' with pins, there is a key difference that is important for fixture compatibility. The distance between the pins for both is 4 millimeters, but the pin diameter varies.
| Base Type | Pin Distance | Pin Diameter | Typical Shape |
|---|---|---|---|
| G4 | 4 mm | 0.65 - 0.75 mm | Capsule |
| GU4 | 4 mm | 0.95 - 1.05 mm | MR11 reflector (spot shape) |
This means a GU4 lamp will not fit in a G4 fixture and vice versa. Always carefully check which type of base your fixture requires.
Easy Replacement: Switching from Halogen G4 to LED G4
Replacing a halogen G4 lamp with an LED variant is a relatively simple process. Follow these steps for a safe and correct replacement:
- Switch off the power: Safety first. Ensure the power to the fixture is completely turned off before you begin.
- Allow the old lamp to cool: Halogen lamps get very hot. Allow the lamp to cool sufficiently (about 30 minutes) before touching it.
- Remove the halogen lamp: Gently pull the old G4 halogen lamp straight out of the socket. Pull it straight and avoid wiggling as much as possible to prevent damaging the socket.
- Insert the new LED G4 lamp: Carefully insert the pins of the LED G4 lamp into the socket. Make sure the pins fit correctly into the openings and do not bend. Apply light, even pressure until the lamp is secure.
- Switch the power back on: Once the new lamp is properly installed, you can turn the power back on.