Collection: LED Signaling & Stop

Why switch to LED signal lights?

Switching to LED signal lights offers several measurable advantages:

• 5 times faster response time than halogen — a critical point for brake lights. A halogen bulb takes 200 to 300 milliseconds to reach full power; an LED lights up in less than 50 ms. At 90 km/h, this difference represents nearly 5 meters less stopping distance for the following vehicle.
• 10 to 15 times longer lifespan than halogen — particularly useful for turn signals in intensive urban use.
• Consumption divided by 5 — eases the alternator and preserves the battery on vehicles with frequent stops/starts (city cars in urban use).

LED Stop and LED Turn Signals: Technical Points to Know

LED Brake Lights: direct replacement without constraints on most vehicles. On recent models (post-2010) with a CAN-Bus system, check compatibility — a non-Canbus LED may trigger an error light on the dashboard, without preventing operation.

LED Turn Signals: beware of hyperflashing (too fast blinking). Cause: the LED consumes less than an equivalent halogen bulb — the car's computer interprets this decrease as a burnt out bulb and speeds up the flash rate to warn the driver. Two solutions:

• Canbus LED — integrates a load resistor that simulates the consumption of a halogen bulb. Clean solution, no modification.
• External Load Resistor — 50 W / 6 Ω resistor to be mounted in parallel with each turn signal. More economical, but requires electrical installation.

What is the CAN-Bus system?

The CAN-Bus (Controller Area Network) is an electronic communication system used in modern vehicles (post-2005 approximately). It allows the various ECUs (Electronic Control Units) in the car to communicate with each other and continuously monitor the status of equipment — including the consumption of each bulb.

A "Canbus" LED is designed to electrically replicate the behavior of a standard halogen bulb: same resistance, same apparent consumption. The ECU detects no anomaly. For demanding CAN-Bus vehicles (Audi, BMW, Mercedes, some Volkswagen post-2015), always choose the Canbus version.

P21W, BA15S and P21/5W in LED

The three most common bases for rear signaling are available in LED:

• P21W (BA15S) — turn signals, reverse lights, rear fog lights. White and amber versions.
• P21/5W (BAY15D) — combines parking light (5 W) and brake light (21 W) in a single dual-filament bulb.
• PY21W (BAU15S) — amber turn signals with offset pins (anti-reversal).