They are a huge amount brighter and technically they are illegal, but I guess it depends how clued up your local police force are (lol at northants). Probably wouldn't wanna risk it as much with yours aswell as it's newer. HID's are cooler and use less power than Halogen, the RING bulbs are advertised the most but upon seeing results and autoexpress tests the Philips came out by far the best. your choice though! I work for halfords and we have our 90% brighter which are good but don't last that long. Ali