20W G4 bi-pin halogen capsule lamp with a 12V operating voltage and warm white 3000K illumination. Delivering approximately 280 lumens, this dimmable Osram lamp is ideal for display lighting, cabinet lighting, decorative fittings, and specialist low-voltage applications.
What it is
The Osram G4 20W 12V Halogen Capsule Lamp is a premium low-voltage halogen lamp engineered to deliver bright, natural illumination with outstanding colour accuracy. Featuring a clear glass capsule, G4 bi-pin base, and 12V operating voltage, this compact lamp provides consistent, high-quality lighting for decorative, architectural, and specialist applications.
Producing approximately 280 lumens of warm 3000K light, it reaches full brightness instantly and offers smooth dimming when used with compatible transformers and dimmers. Its compact capsule design makes it ideal for luminaires where space is limited but excellent light quality is essential.
Use Cases / Applications
Ideal for a wide range of residential, commercial, and specialist lighting applications, including:
| Application |
Suitable? |
Notes |
| Display Cabinets & Showcases |
✅ Yes |
Excellent colour rendering enhances merchandise and exhibits. |
| Cabinet & Furniture Lighting |
✅ Yes |
Compact design fits confined spaces with ease. |
| Decorative Lighting |
✅ Yes |
Perfect for feature lighting and architectural accents. |
| Accent Lighting |
✅ Yes |
Provides focused, warm illumination for highlighting objects. |
| Hospitality Lighting |
✅ Yes |
Popular in hotels, restaurants, and luxury interiors. |
| Landscape Lighting |
✅ Yes |
Suitable for compatible 12V outdoor lighting systems. |
| Marine & Caravan Systems |
✅ Yes |
Ideal for compatible 12V low-voltage installations. |
| Photography Equipment |
⚠️ Equipment Dependent |
Suitable only where a 12V G4 20W lamp is specified. |
| Medical Equipment |
⚠️ Equipment Dependent |
Compatible only with equipment designed for this exact specification. |
| Projectors & Optical Equipment |
⚠️ Equipment Dependent |
Use only where the equipment manufacturer specifies a G4 20W 12V capsule. |
Key Benefits
- Delivers approximately 280 lumens of warm white illumination
- Warm 3000K light creates a comfortable and inviting atmosphere
- Excellent colour rendering for true-to-life colour reproduction
- Fully dimmable for customised lighting control
- Compact G4 capsule design for space-saving installations
- Instant full brightness with no warm-up time
- Trusted Osram quality and precision engineering
- Ideal for decorative, display, architectural, and specialist lighting applications
Halogen lamps are valued for their crisp, natural light and excellent colour rendering, making them the preferred choice for applications where colour accuracy and visual detail are important.
Safety Compliance
- Rated for 12V low-voltage operation
- Fully dimmable with compatible transformers and dimmers
- Suitable for compatible G4 lamp holders
- Install according to luminaire and transformer manufacturer recommendations
- Always isolate power before replacing the lamp
Brand Reputation
Osram is one of the world’s leading lighting manufacturers, trusted by electricians, contractors, lighting designers, and equipment manufacturers. Renowned for precision engineering and consistent quality, Osram lamps deliver reliable performance across residential, commercial, industrial, and specialist applications.
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