Upgrade compatible 580 / W21/5W / 7443 brake and tail-light applications with this matching pair of HIDS-DIRECT red LED bulbs. Each bulb combines seven 3030 SMD LEDs, integrated CANBUS-ready electronics and a compact T20 / W3×16q dual-contact wedge fitting for compatible 12V–24V DC vehicle electrical systems.
580 / W21/5W Dual-Intensity Fitting This product is the dual-intensity W21/5W / 7443 format. It should not be confused with the visually similar single-intensity W21W / 7440 bulb. Check the reference and colour of your original bulb before ordering.
W21/5W580 / 7443
DUALBrake / Tail
7×3030SMD LEDs
REDLight Output
CANBUSReady
12V–24VDC Systems
Red Brake & Tail Operation
Two Red Intensity Levels In One Bulb
The 580 / W21/5W / 7443 format provides two electrical intensity levels within one bulb, allowing compatible rear-lamp assemblies to use a lower tail-light level and a stronger brake-light level. The vehicle and lamp assembly determine the function, so always match the replacement to the original dual-intensity bulb reference.
DUAL INTENSITY
Brake & Tail FormatDesigned for compatible rear-light applications requiring the dual-intensity 580 / 7443 format.
RED OUTPUT
Purpose-Matched ColourRed LED output for compatible red brake and tail-light applications.
INSTANT RESPONSE
Immediate IlluminationLEDs illuminate immediately when energised for a clean, defined lighting response.
3030 SMD Construction
Seven Red LEDs Positioned Around Each Bulb
Each bulb uses seven red 3030 SMD LEDs: three positioned on each side of the bulb body plus one forward-facing LED behind the clear projector lens. The optical lens supports forward light distribution while the side-facing chips provide illumination around the lamp reflector.
Integrated Electronics
CANBUS-Ready 12V–24V Control
The integrated driver provides constant-current control across compatible 12V–24V DC vehicle systems. CANBUS-ready electronics are designed to improve compatibility with vehicle bulb-monitoring systems and help reduce warning messages that can occur when lower-current LEDs replace conventional bulbs.
CANBUS compatibility varies by vehicle.CANBUS-ready does not mean universally error-free. Some sensitive vehicle monitoring systems may still require an additional resistor, decoder or other corrective component.
Important Fitment Check
580 / W21/5W / 7443 vs W21W / 7440
These fittings can appear similar, but they are not the same electrical bulb type. 7443 / W21/5W is dual intensity, whereas 7440 / W21W is single intensity. This product uses a T20 / W3×16q dual-contact wedge base. Compare your original bulb, socket and required light colour before ordering.
Twin Bulb Pack & Installation
Supplied As A Pair For Direct Plug-In Replacement
The listed price includes two matching red 580 / W21/5W / 7443 LED bulbs. On compatible applications, installation is a straight pull-out and push-in replacement: switch off the vehicle lighting, remove the existing wedge bulb, insert the replacement securely and test both brake and tail functions before driving.
HIDS-DIRECT Warranty
One-Year Warranty Protection
This matching pair is supplied with 12-month HIDS-DIRECT warranty protection. The bulbs combine red dual-intensity output, instant LED response, CANBUS-ready electronics and a compact direct-fit wedge design.
HIDS-DIRECT LED Demonstration
See Our 3030 SMD LED Bulb Range In Action
Watch a short HIDS-DIRECT automotive LED range demonstration showing several replacement bulb formats alongside a live illumination test. The product offered on this page is the red 580 / W21/5W / 7443 dual-intensity 7×3030 SMD version.
About The DemonstrationThe video covers the wider HIDS-DIRECT automotive LED range and may show other fittings, colours and LED designs. Use the specifications and fitment information on this page when selecting this red W21/5W product.
CANBUS Ready – Not Universally Error-FreeIntegrated electronics are designed to reduce LED bulb-out warnings on compatible vehicles. Some applications may still require additional resistance or decoding.
This is the dual-intensity W21/5W format, commonly referenced as 580 or 7443. It is not the single-intensity W21W / 7440 format.
What colour light do these bulbs produce?
This listing is for the red-output version intended for compatible red brake and tail-light applications.
How are the seven 3030 LEDs arranged?
Each bulb has three red 3030 SMD LEDs on each side plus one forward-facing LED behind the projector lens, giving seven LEDs in total.
Will the CANBUS electronics stop every dashboard warning?
No universal guarantee can be made because vehicle monitoring systems differ. The integrated electronics are designed to reduce warnings, but some vehicles may still need an additional resistor or decoder.
Can these bulbs be used on a 24V electrical system?
They are designed for compatible 12V–24V DC vehicle electrical systems.
Do I receive one bulb or two?
This listing is supplied as a matching pair containing two red LED bulbs.
✓ Correct Bulb IdentificationClear 580 / W21/5W / 7443 information helps distinguish this product from W21W / 7440.
● Red Brake / Tail OutputPurpose-matched red LED output for compatible dual-intensity rear-light applications.
★ 1 Year WarrantyUK-based HIDS-DIRECT support with 12-month warranty protection.