PHILIPSUltinon Pro7000 LED car signaling bulb (WY21W amber), 12V/24V

Nice & bright. These are perfect replacements for older or factory fitted courtesy light in a vehicle.

Bright and nice red color. Perfect fit for brake lights on old car.

I changed my brake lights (one had blown) for these LEDs. Unbeknown to me, because they are low wattage the car's management system detected it as an electrical fault and the EPC warning light came on. It took me a trip to the garage (and almost a £120 bill for fitting a new brake switch) before they spotted the LED bulbs. Ordinary bulbs were put in and problem solved. If your car didn't come with LED bulbs, don't use them.

Replaced old boot light. Much whiter and brighter. No errors as of yet.

I bought the Philips Ultinon Pro7000 LED P21/5W Red bulbs for my 2010 Peugeot 3008, and they’ve made a huge difference. If you own one of these early 3008s, you’ll know they seem to chew through halogen bulbs like sweets—it’s a well-known quirk. I was fed up with constantly replacing them and wanted something brighter, longer-lasting, and simply more reliable.These bulbs aren’t cheap—in fact, I almost didn’t buy them because of the price. Sure, there are more affordable options made in countries that rhyme with diner, but you’ve got to ask yourself: these are the only lights that signal you’re slowing or stopping. Do you really want to risk a poor-quality bulb failing at the wrong time? I decided peace of mind was worth the extra cost.To fit them, I removed the taillight housing from the car, disconnected the electrical connector, took out the old bulbs, and installed the new LEDs. I found this easy, but each car is different, some more awkward than others.The Phillips bulbs fitted perfectly into the housings as if they were a halogen bulb. Before reassembling everything, it’s important to test them. Ask a friend or family member to press the brake pedal with the ignition on. First, check brake light function with the headlights off. Then turn the headlights on to verify the tail light function, and once again press the brake to make sure both modes work together as they should. If everything looks good, go ahead and reassemble the housing.The colour output is where these bulbs truly stand out. Most LED P21/5W replacements are white LEDs. Time to get technical, this are around 6000–6500K on the Kelvin scale, which gives a cold, bluish-white light. Halogen bulbs are closer to 3000K, with a much warmer tone. When you put either one behind a red tail light lens, the red lens has to filter out non-red wavelengths. That often results in a dull, weak, or even pinkish light, especially with white LEDs.But these Philips LEDs emit true pure red light, meaning no filtering is needed. The result is a deep, rich, and very visible pure red that looks clean and is visible, day or night. They also respond instantly—as soon as you press the brake pedal, they’re at full brightness—which adds an extra bit of safety.Now, a heads-up: my car does think the brake lights are faulty with these installed. There’s no flashing warning light or beeping, but when I checked the warning log in the car’s trip computer/radio menu, it showed a bulb fault. This happens because LEDs draw less current than halogen bulbs—the car interprets this lower resistance as a bulb failure even though everything works fine.This kind of error is car-specific—some vehicles handle LED swaps without issue, others like mine will quietly log it as a fault (others not so quietly). However, as the car isn’t flashing or beeping at me, I can live with that. It doesn’t affect function, and the lights still perform flawlessly.Final verdict:Yes, they’re expensive—but in return you get increased visibility, instant response, and a deep, true red light that looks and feels premium. If you’re upgrading from halogens and want a safer, more noticeable rear light, these are well worth considering.Legal note (UK): Brake and tail lights are classified as obligatory lamps under the Road Vehicles Lighting Regulations 1989. Technically, unless the vehicle was originally equipped with LED brake/tail lights, fitting aftermarket LED bulbs is not road legal, as they may not comply with ECE Regulation 37 (which governs filament bulb replacements). As they are technically not legal for road use in the UK, you could face a roadside fixed penalty notice from the Police of £50 per non-compliant bulb or fail an MOT. That said, I’ve had these installed for a while with no issues. I haven’t been stopped by police, but as for the MOT, I won’t know for sure until it's due. Always check your local laws and legislation and vehicle requirements before fitting LED bulbs in safety critical positions. Ultimately, it is up to you if you risk having these installed.

The media could not be loaded. Bulbs used for brake lights as one of the old halogen bulbs blew out. Perfect fit in the existing housing and these led bulbs light up instantly when braking which make them safer compared to the slow fading in of halogen bulbs. They are brighter than the halogen bulbs and they look brighter in person than on camera. No canbus error aswell.

Work good when they need but after turning on they're really dimly lit even when the lights are turned on, this resets after you turn the car on and off but I don't want this to keep happening, color is bright but not as bright as it thought it'd be, a nice white very clear, they don't present an error but they also flicker occasionally will be going back unfortunately, they are a perfect fit for t10

Excellent bulbs, no bigger than standard ones, and with a plastic cover over them to protect the LED chips. Why can’t they all be like this!!