W21W T20 7440 LED BULBS LONGLIFE RED VERY BRIGHT 1600LM BRAKE LIGHT 12V

W21W T20 7440 LED BULBS LONGLIFE RED VERY BRIGHT 1600LM BRAKE LIGHT 12V

series LONGLIFE

➡️ BRAKE LIGHTS

✅ lifespan -  5 YEARS or 100,000 km !!!!

☝️ CANBUS - depending on the vehicle's diagnostic system - check the bulb specifications below

MAGALL LONGLIFE LED bulbs are made of top-quality materials.

• Special aluminium alloy
• Passive heat sink
• Korean LED CHIPS covered with a silicone lensthat protects them and acts as an optic, improving light output through proper refraction and diffusion.

All this makes them exceptional bulbs that are very durable and weather-resistant.

➡️ Specifications:

• Base type: W21W T20 7440
• Luminous flux: 800LM
• Power: 10 W
• Current: 0.7 A
• Resistance - 20Ω
• Voltage: 12V (do not use on 24V)
• LED type: 7035 CSP
• Overall length: 45mm
• Width: 20.5mm
• Colour: Red

For comparison, the specifications of standard W21W bulbs

• Luminous flux: 400LM
• Power: 21 W
• Current: 1.5 A
• Resistance - 9,3Ω

This improves visibility around the vehicle and driving comfort.

➡️Better compatibility: Placing the LED chips in the same position as the filament in a halogen bulb ensures that the LED bulb has geometry compatible with the vehicle's lamp housing. This avoids problems fitting LED bulbs into existing lighting systems.

➡️360-degree viewing angle: LED chips on both sides of the bulb provide a full 360-degree viewing angle, which means the light is spread evenly in all directions

➡️Light efficiency: Placing the LED chips in the right position gives bright, concentrated light, which is important for driving safety.

➡️Powerful light: Our 1600LM, 10W LED bulbs provide the right light to increase visibility and safety while driving.

➡️Excellent heat dissipation: The 6063 aircraft-grade aluminium body provides excellent heat dissipation, keeping the bulb's operating temperature lower while increasing its brightness and durability.

➡️Application⬅️

☝️Brake lights (stop/tail light): Red P21W BA15S 1156 bulbs are commonly used as brake lights in the vehicle's rear lamps. When you press the brake pedal, the red brake light comes on, signalling to drivers behind you that you are stopping or braking. This is key to road safety.

☝️Rear fog lights (rear fog light): In some countries or regions red P21W bulbs can be used as rear fog lights, which are switched on in dense fog or rain to make the rear of the vehicle more visible.

✅Important product information – benefits and safety rules

1. Operating temperature – modern and controlled Our LED bulbs reach a temperature of about 100°C during operation. This is a normal, fully controlled design feature that shows they are working correctly and efficiently.

2. Safety for your car – a key advantage over tradition Unlike our LEDs, traditional halogen car bulbs generate extreme heat. The temperature of their glass bulb reaches 200°C to as much as 250°C! Thanks to a much lower operating temperature, our LED bulbs are 100% safe for factory lamps and headlights. There is no risk of damage, clouding or melting, a common problem with overheating halogens.

3. Warning – your safety during installation Remember that even 100°C can cause burns. Always avoid touching the bulb while it is on and immediately after switching it off.

MAGALL LED bulbs comply with the EMC Directive 2014/30/EU and have passed EN IEC 55015:2019+A11:2020 testing.

Meeting the requirements of the EMC Directive, MAGALL bulbs are designed not to interfere with other electrical devices and are resistant to external electromagnetic interference. This means stable, trouble-free operation throughout their service life, adding to the convenience, safety and comfort of everyday use of MAGALL LED lighting.

MAGALL LED bulbs carry the CE mark and meet European Union requirements for safety, health and environmental protection. The CE mark shows that the products have been tested for safe use and meet the strict quality and technical standards required in the EU.

Are LED bulbs type-approved (homologated)?

All LED light sources available on the market were designed for headlights that meet the standards for halogen or conventional bulbs. The European Union has not yet adopted the comprehensive regulations needed to legalise LED retrofit light sources.  Some even put an E… mark on the product to reinforce this belief. We do not use such practices.

In the European Union, automotive products must have UNECE certification to be used on public roads. Existing ECE certificates cover only halogen and xenon bulbs and LED light sources fitted as original equipment in new vehicles. However, there are no specific type-approval requirements or restrictions on using LED light sources on private roads, race tracks, etc. That is why leading manufacturers of automotive LED lighting mark their products "off-road use only" or "not for use on public roads".

Although the law has not changed, we believe our customers now know enough about LED light sources to make an informed choice and a satisfying purchase.

and are tested to EN IEC 55015:2019+A11:2020 and EN 61547:2009

CANBUS – how it works and why it matters for LED bulbs

CAN BUS (Controller Area Network Bus) is a car's internal communication network that lets electronic modules (e.g. the BCM – Body Control Module) exchange data without extra wiring.

The computer does not check whether the bulb actually lights up – it measures the current draw and the circuit resistance.

• Test when the ignition is switched on: the computer sends a short pulse and checks whether the resistance falls within the so-called acceptance window, i.e. the permitted range of values.
• Continuous measurement while driving: in more advanced cars the BCM constantly monitors the current. If the LED bulb has different characteristics from a halogen (e.g. lower current draw), the system may treat this as a fault and display a "bulb out" message.

In practice, different cars have different tolerance ranges and CANBUS standards – they differ in data transfer speed, how the circuit is tested, and resistance and power draw requirements.

So saying that an LED bulb "has CANBUS" or "doesn't have CANBUS" is a simplification. It all depends on the tolerance of the vehicle's diagnostic system and the parameters of the LED bulb itself.

An illustrative example of how it works:

an H7 halogen bulb has a resistance of 3,6Ω

1.

• an example H7 LED bulb has a resistance of 10 Ω
• car A (acceptable range) 2,5–7 Ω – warning
• car B (acceptable range) 2–12 Ω – no warning
• car C (acceptable range) 3–5 Ω – warning

2.

• an example H7 LED bulb has a resistance of 6 Ω
• car A (acceptable range) 2,5–7 Ω – no warning
• car B (acceptable range) 2–12 Ω – no warning
• car C (acceptable range) 3–5 Ω – warning

3.

• an example H7 LED bulb has a resistance of 2,5 Ω
• car A (acceptable range) 2,5–7 Ω – no warning
• car B (acceptable range) 2–12 Ω – no warning
• car C (acceptable range) 3–5 Ω – warning (short circuit)

Now you know why the same bulbs work without warnings for some users while for others the on-board computer reports a problem.

W21W T20 7440 LED bulbs Longlife in red for brake and rear lights. Very bright, durable and reliable. W21W T20 7440 LED bulb red 1600lm 12V rear brake light longlife CANBUS car bulb.

In our listings we state the technical parameters preciselyto make it easier to choose bulbs for a specific car model and avoid misunderstandings.