The rear fog is a single bright red light, usually on one side only. It is a legal requirement on UK cars and one of the more common MOT failures when the bulb goes.
Most cars use 382 P21W or 380 BAY15D. A red lens takes a white bulb. A clear lens needs a red bulb.
Rear fog circuits are monitored on most modern cars, so a CANbus version avoids a bulb fault warning.
Our P21W (BA15S 382) Ford Transit Custom Fog Light LED Bulbs have been developed not only to illuminate the bulb housing, but to also project the l...
View full detailsOur P21W (BA15S 382) LED Bulbs have been developed not only to illuminate the bulb housing, but to project the light out of the housing and into t...
View full detailsOur P215W (BAY15D 380) LED Bulbs have been developed not only to illuminate the bulb housing, but to project the light out of the housing and into...
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Last updated: June 2026. When it comes to vehicle lighting, the choice of bulb can significantly impact visibility, safety, and aesthetics. Today we focus on the H11 | 711 bulb and the various options available. This guide covers everything you...
"What's the brightest H7 bulb?" is one of the most common questions we get at Xenons Online. The short answer is below, followed by a full breakdown of how H7 halogen, Xenon HID and LED bulbs compare on brightness —...
When it comes to illuminating the road, car headlights have evolved significantly over the years.
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