Osram 380 Twin Blister Pack 12V 5W Stop Side Flasher | Euro Car Parts

The Osram 380 twin blister pack provides a reliable and consistent illumination solution for critical vehicle functions – specifically stop lights, side marker lights, and flashers. This pack contains two 12V 5W bulbs, designed as direct replacements for existing lamps within compatible vehicles. Understanding the specifications and application of these bulbs is crucial for maintaining vehicle safety and legal compliance.

Osram is a globally recognised leader in automotive lighting technology, with a long-standing reputation for quality, durability, and performance. The 380 series bulb represents a standard offering within their extensive catalogue, engineered to meet the demanding requirements of modern vehicles. These bulbs aren't simply about providing light; they are integral components contributing to visibility and signalling intent to other road users.

Key Features & Specifications:

• Voltage: 12V – Standard voltage for most passenger vehicle electrical systems.
• Wattage: 5W – Indicates the power consumption of each bulb, influencing brightness and heat generation.
• Bulb Type: P21/5W (often referred to as a 'double filament' bulb) – This designation is critical for ensuring compatibility with your vehicle’s lamp holders. The ‘P’ indicates a push-and-twist base, while the numerical code specifies dimensions and electrical connections.
• Base Type: BAY15d – A specific type of bayonet mount base known for its secure connection and ease of installation.
• Functionality: Stop/Tail/Side Marker/Flasher – This bulb is multi-functional, capable of serving various signalling roles depending on the vehicle’s wiring configuration. It's important to consult your vehicle’s handbook to confirm correct application.
• Pack Quantity: 2 Bulbs – The twin pack offers a cost-effective solution for replacing both bulbs simultaneously, ensuring balanced brightness and reducing the likelihood of future failures requiring further work.

Understanding Bulb Applications:

The Osram 380 bulb’s versatility stems from its dual filament design. One filament operates at a higher wattage for brighter illumination when used as a stop light, while the other functions at a lower wattage for tail lights and side marker/flasher applications. This arrangement allows a single bulb to fulfil multiple roles, simplifying vehicle electrical systems.

Stop Lights: When activated by the brake pedal, the higher-wattage filament illuminates brightly, providing a clear signal to drivers behind you that you are decelerating. A functioning stop light is legally required for roadworthiness in the UK.

Tail Lights: The lower-wattage filament provides constant illumination as tail lights, enhancing vehicle visibility during low-light conditions and at night.

Side Marker/Flasher Lights: These lights are crucial for indicating your vehicle’s presence to other road users, particularly in adverse weather or when manoeuvring. The bulb operates as a flasher when the indicator stalk is engaged.

Compatibility Considerations:

While the Osram 380 is a widely compatible bulb, it’s essential to verify its suitability for your specific vehicle model and year of manufacture. Incorrect bulb types can lead to electrical issues or reduced performance. Refer to your vehicle's owner's manual or utilise online bulb finders (available on the Osram website or through automotive parts retailers) to confirm compatibility before purchasing.

Installation Notes:

Replacing bulbs is a relatively straightforward task for those with basic mechanical skills. However, it’s crucial to disconnect the vehicle's battery negative terminal before commencing any electrical work to prevent short circuits or electric shock. Always handle bulbs by their base and avoid touching the glass envelope, as oils from your skin can reduce bulb life. If you are unsure about any aspect of the installation process, consult a qualified automotive technician.

Quality & Longevity:

Osram bulbs are manufactured to stringent quality control standards, ensuring consistent performance and extended service life. While bulb lifespan varies depending on usage conditions and vehicle electrical system health, Osram 380 bulbs generally offer a reliable illumination solution for an extended period.