T4W T8.5
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MODEL NAMEITEMVOLTAGEWATTAGEBASECERTB8512400T4W T8.512V4WBA9sE4
Product Specifications
| Voltage | Wattage | Color | Base | ECE |
| 12V | 21W | Clear | BA9s | ECE |
The T4W halogen lamp with a rated voltage of 12V, power of 4W and base model of BA9s is a typical low-voltage miniature lighting source. T4W is a universal industry specification code. The 12V rated voltage is compatible with the electrical systems of vehicles such as cars and motorcycles. The low-power design of 4W features low energy consumption and low heat generation, enabling long-term stable operation and avoiding damage to components around the lamp due to overheating.

It is equipped with a small plug-in BA9s base with a compact size, which is compatible with various types of miniature special lamp holders and can be easily installed and disassembled without professional tools. This lamp emits soft and uniform light with good color rendering. It is widely used in auxiliary lighting scenarios such as vehicle dashboard backlighting, door welcome lights and trunk small lighting. Thanks to its compact size and low-power advantage, it has become an economical and practical choice for miniature auxiliary lighting in transportation vehicles.