If you're looking for a bulb that will deliver the closest match to Xenon HID, it's important to establish exactly what you're looking for. Once you've done this, the choice of which product is much easier.
Are Xenon HID Kits illegal?
Xenon HID is an excellent lighting system but must be factory fitted to be road legal. If you want to use xenon HID bulbs but your car uses halogen, you can purchase an HID Conversion Kit. This allows you to use HID bulbs in your halogen fittings, as usually they're not interchangeable. However, you'll need a little bit of know-how to do this.
If your vehicle has a halogen headlight unit, it's much simpler to upgrade the existing halogen bulb rather than add an HID kit. It's fully road legal and doesn't require any modifications to the vehicle, nor will it void your warranty, MOT or insurance.
Maximum light output or styling?
Xenon HID does two things; it delivers a lot more light on the road and it also has a distinctive blue/white colour. Unfortunately, the limitations of halogen mean we're not able to fully replicate these together to the same level, so it's much better to isolate one of these factors as a priority. This will ensure you get the best type of product for your needs.
I want to see as much of the road as (legally) possible
Choose a maximum performance product such as Philips RacingVision or OSRAM Night Breaker Laser (Next Generation). These will deliver up to 150% more light than a standard bulb. It is not designed for styling so although the colour will be whiter than a standard lamp, this isn't the purpose of the product. Customers who are specifically looking for a bulb that will deliver the closest colour match to HID should choose another product.
I want to obtain the closest colour match to Xenon HID
If you're more interested in the styling aspect of HID and you'd like the light generated by your headlights to be a crisp white colour with a subtle blue styled tint to oncoming traffic, then you should look at a product like Philips DiamondVision, or PIAA Hyper Arros 5000K. It has been specifically designed for this purpose and has a colour temperature of 5000K (Kelvin) - a factory fitted Xenon HID system is about 4300K, so it's a very close match. However, increasing light output is not the main purpose of this product. If you want the most light on the road then you need to look at another type of product.
Can I get both maximum light output and styling?
In all honesty, no. It's much better to choose the objective that is most important to you in order to avoid disappointment. With halogen bulbs, their power goes into either making the light as white as possible, or creating the maximum amount of light. If you try and go for a mix of both, you'll end up compromising on both.
The best option in this case would be to choose an LED headlight bulb. These are not road legal and you also may need to purchase a canbus control unit. LED bulbs will give you a good mix of brighter and whiter light.
Feel free to contact us if you need any further advice.