P21/5W (380) Super Canbus Red LED Brake & Tail Light Bulbs 300LM Fan Cooled

P21/5W (380) Super Canbus Red LED Brake & Tail Light Bulbs 300LM Fan Cooled

Upgrade your vehicle's original P21/5W (380) brake and tail light bulbs with these premium Super Canbus Red LED replacements. Designed for compatible dual-intensity rear lighting applications, these bulbs produce a strong, pure red light with up to 300 lumens on high output and 90 lumens on low output.

Each bulb combines automotive-grade LED chips, an intelligent Super Canbus driver and an integrated high-speed cooling fan to provide fast illumination, stable performance and improved compatibility with modern vehicle electrical systems.

Key Features

• Super Canbus P21/5W (380) Red LED Bulbs
• Designed for compatible brake and tail light applications
• Dual-intensity high and low light output
• 300 Lumens high output
• 90 Lumens low output
• Pure red LED light
• 18W High Output / 2.5W Low Output
• Automotive-grade LED chips
• Built-in intelligent Super Canbus driver
• Integrated high-speed cooling fan
• Aviation-grade aluminium body
• 360° light distribution
• Plug & Play installation
• Non-polarity design
• Instant illumination
• Over 40,000-hour lifespan
• Energy-efficient operation
• Supplied as a pair

Designed for Brake & Tail Light Operation

The P21/5W (380) is a dual-intensity bulb type designed to provide two separate light outputs from a single bulb.

The lower 90-lumen output is designed for the tail or rear position light function, while the brighter 300-lumen output is activated for the brake light function.

This allows the bulb to reproduce the original high and low brightness operation of a conventional P21/5W filament bulb in a compatible lamp unit.

Pure Red LED Output

These bulbs generate red light directly from the LED chips rather than relying on white light passing through a coloured lens.

This produces a strong and consistent red output, making them ideal for use behind clear or red lamp lenses where a red P21/5W bulb is required.

Using a dedicated red LED bulb can also provide a richer and more defined colour than a white LED fitted behind a red lens.

Faster Brake Light Illumination

LED bulbs illuminate almost instantly when electrical power is applied. This means the brake light reaches full brightness faster than a traditional filament bulb.

The quicker response can help make your braking intentions more noticeable to following drivers, particularly in poor weather or low-light conditions.

Intelligent Super Canbus Technology

Each bulb incorporates an intelligent Super Canbus driver designed to minimise dashboard bulb warning messages, flickering, shut-off issues and electrical interference on many modern vehicles.

Whilst compatible with most Canbus systems, some vehicles with particularly sensitive bulb-monitoring circuits may still require an additional load resistor or Canbus decoder.

Advanced Active Cooling

A built-in high-speed turbine cooling fan continuously removes heat from the LED chips, helping maintain stable light output during prolonged operation.

The fan works together with the CNC-machined aviation-grade aluminium body to improve heat dissipation and support reliable long-term performance.

360° LED Light Distribution

The multi-sided LED chip arrangement provides wide and even light distribution throughout the lamp reflector.

This design helps closely replicate the light position of the original filament bulb, supporting consistent illumination across both brake and tail light functions.

Ideal Applications

• Brake Lights
• Tail Lights
• Stop and Tail Combination Lamps
• Rear Position Lights
• Clear rear lamp units requiring a red bulb
• Red rear lamp units requiring a P21/5W replacement
• Any compatible application requiring a P21/5W (380) bulb
• Any compatible application requiring a BAY15D dual-contact base

Technical Specifications

P21/5W and 380 Bulb Compatibility

P21/5W and 380 are commonly used references for the same dual-intensity automotive bulb type.

These bulbs use a BAY15D dual-contact base with two electrical contacts on the bottom and side locating pins positioned at different heights.

Do not confuse BAY15D with similar-looking bases such as BA15S, BA15D, BAZ15D or BAU15S. These bulb bases are not interchangeable.

Please remove and inspect your existing bulb before ordering, paying particular attention to the side-pin position and the number of electrical contacts.

Package Contents

• 2 × Super Canbus P21/5W (380) Red LED Bulbs
• Retail Presentation Box

Important Information

• Please check your existing bulb type and base before ordering.
• Designed for vehicles requiring P21/5W (380) BAY15D dual-intensity bulbs.
• Suitable for compatible brake and tail light applications.
• Please confirm that a red bulb is suitable for your lamp lens and intended function.
• Do not order solely by vehicle make, model or registration number.
• Canbus compatible with most vehicles.
• Some vehicles with highly sensitive bulb-monitoring systems may still require additional resistors or decoders.
• Suitable for 12V vehicle electrical systems.
• Road-use legality depends on the vehicle, lamp unit and intended application.

Why Buy from HIDS-DIRECT?

HIDS-DIRECT specialises in premium automotive lighting products, supplying high-quality LED upgrades trusted by thousands of customers across the UK.

Every product is carefully selected for performance, reliability and ease of installation, helping you upgrade your vehicle with confidence.

Frequently Asked Questions

Will these P21/5W red LED bulbs fit my vehicle?

These bulbs are designed for vehicles that use a P21/5W (380) bulb with a BAY15D dual-contact base. Please remove and inspect your existing bulb, consult your vehicle handbook or compare the base before ordering.

Are P21/5W and 380 the same bulb type?

Yes. P21/5W and 380 are commonly used references for the same dual-intensity automotive bulb type. They normally use a BAY15D base with two bottom contacts and locating pins positioned at different heights.

Do these bulbs provide both brake and tail light functions?

Yes. These are dual-intensity bulbs. They provide a lower 90-lumen output for the tail or rear position light and a brighter 300-lumen output for the brake light function.

Can these bulbs be used behind a clear lens?

Yes, provided the lamp unit requires a red bulb and the P21/5W BAY15D base is correct. Because the LEDs generate red light directly, they are particularly suitable for clear lamp lenses requiring a red output.

Can these bulbs be used behind a red lens?

Yes, provided the bulb type and electrical specifications are compatible. A dedicated red LED bulb can produce a richer red output through a red lens than a white LED replacement.

Are these bulbs Canbus compatible?

Yes. They contain built-in Super Canbus electronics designed to reduce dashboard bulb warnings, flickering and shut-off issues on many modern vehicles. Some highly sensitive vehicles may still require an additional resistor or decoder.

What is the difference between BAY15D and BAZ15D?

A BAY15D base has two electrical contacts and side locating pins positioned at different heights. A BAZ15D base uses a different offset pin arrangement. Although they can look similar, they are not interchangeable.

Are these bulbs polarity sensitive?

No. They use a non-polarity design, allowing them to operate regardless of the positive and negative electrical orientation within a compatible socket.

Do these bulbs have a cooling fan?

Yes. Each bulb includes a built-in high-speed turbine fan to help remove heat from the LED chips and maintain stable performance during prolonged use.

Do I need to modify the wiring?

No. These bulbs are designed as a direct Plug & Play replacement for a compatible P21/5W BAY15D socket. No rewiring or coding is normally required.

How many bulbs are supplied?

This product is supplied as a pack of two red LED bulbs.

Are these red LED bulbs road legal?

Road-use legality depends on the vehicle, lamp unit and intended function. LED retrofit bulbs may not be approved for every exterior lighting application, so please check the relevant vehicle-lighting regulations before installation.