The "Xenon Effect" on the box definitely can NOT refer to the colour of these bulbs matching high-intensity discharge (HID) Xenon headlamps, as tungsten always burns more orange or yellow compared to HIDs or LEDs, so it can only be a reference to the halogen cycle I've outlined. This manifests itself in the different lights produced: my previous Osram Nightbreakers were usefully bright, if slightly yellow ahead. However, if viewed at an angle (as you normally wouldn’t stare directly into a headlight!) then the blue filtration shows as slight blue tint in the reflector, whitening the overall impression. The Phillips bulb is more uniform in colour and whiter overall. Subjectively, I would say slightly less bright as would be expected from the 60% claim and the fact that filtration is by its very nature subtractive. However, the human eye’s response to light isn’t linear, so it doesn’t feel like I’m exactly being short-changed.

The Philips WhiteVision H7 produces a stylish, white beam with a colour temperature of up to 3700K for a premium driving experience.

Identifying and Measuring White Light Bulbs

You will be able to change the bulbs yourself, but the complexity depends entirely on what car you drive. On some cars, it’s very easy, while others are considerably more difficult. For example, some Renault Megane models require you to take off the entire bumper; some Fiat Punto models simply require the removal of a rubber seal. If you're after that Xenon effect with added safety benefits, the Philips WhiteVision is an ideal choice.

Philips RacingVision GT200 bulbs are a popular choice among drivers looking for the best and brightest bulbs. They’re 200% brighter than standard bulbs, so you’ll get more than double the brightness when you switch to Philips RacingVision GT200 bulbs. These bulbs also have an ideal colour temperature, meaning they give off a slightly whiter light. This makes it easier to see clearly since whiter light mimics daylight more closely. A lower colour temperature means that the bulb has a more yellow tone. Bulbs with a colour temperature of 3000K are extremely yellow. These might be used as fog lights. UV-Quartz glass is used to manufacture the WhiteVision bulb, as it is stronger than hard glass and is highly resistant to temperature extremes and vibrations, meaning that the bulb is a lot less likely to fail early. Due to the pressure inside the bulb, the light produced is more powerful and has an extended lifetime in comparison to a standard halogen lamp.Maybe half the lifespan for safer operation is still worth the slight additional investment in both cash and effort. Keep in mind, H7 bulbs are usually halogen bulbs. Xenon HID bulbs are a completely different category with different bulb types.

Ring’s brightest performance upgrade, the Xenon200 H7 bulb offers improved vision by up to 200%. An impressive 3,700K rating is also featured, producing a whiter, more stylish light. One of the brightest H7 bulb options, these road-legal xenon bulbs will bring you brighter vision when driving at night. They achieve this without dazzling other road users or causing eye strain. With no changes to your vehicle’s wiring required, they will also be easy to fit. The H7 bulb was introduced as an improvement on the H4 bulb. The “H” refers to halogen. These bulbs contain a tungsten filament enclosed in a halogen gas-filled quartz capsule. This allows higher light output and improved efficiency compared to old incandescent bulbs. If you want to be able to see clearly while driving in low-light conditions, it's best that you equip your vehicle with white headlights. When it comes to the color of headlights, most countries allow only yellow or white. In the past, all vehicles had headlights with a yellow tint. While yellow headlights can help you see better in wet or foggy conditions, they don't provide the best visibility in clear conditions. Therefore, they're mainly used as fog lights today. All Philips WhiteVision bulbs are fully road legal and are built to the highest ECE certified standards. As well as testing different bulbs, we also based our recommendations upon plenty of research and a number of factors. The factors that we considered included the bulb size selection, colour temperature/light colour output, beam length, build quality, certifications, warranty and value for money. ConclusionIt took me a long time to decide which bulbs to buy and basically I have bought these. I bought the whole range - full beam, dipped beam, side lights ( came free ) and fog lights. One of the leading Philips ranges, the Ultinon Pro9100 LED H7 bulb make the perfect choice if you are looking for a stylish, high-performance bulb. Delivering optimised brightness by up to 350%, these powerful LEDs offer a lifespan of up to 5,000 hours so you can enjoy long-lasting quality. To improve style, Philips Ultinon Pro9100 LED headlight bulbs also feature a whiter 5,800K colour temperature rating. It should be noted however that due to their brightness, these bulbs are not road legal. There are no bad H4 bulbs here, but the RacingVision is our choice. For top D3S performance it has to be the Philips, and Ring is our standard choice. Don’t be tempted to save cash on unbranded alternatives. These LAWTOOLIGHT headlight bulbs provide excellent value for the money with their top-notch performance and incredible life span. Featuring vertically aligned LED components, they perfectly mimic the light pattern of the original halogen bulbs, resulting in a beam that spreads over a larger area. Also, they don't cause glare for oncoming vehicles. Equipped with a 15,000-RPM cooling fan, they have an impressive life span of 60,000 hours, which can greatly reduce your headlight bulb replacement interval.