Extra light, extra brightness, extra-long life. Philips X-tremeVision moto bulbs are the brightest on the market. They deliver up to 130% more light than other headlight bulbs and a powerful beam with a range of up to 130 metres. So you can see further ahead and react faster, which means greater safety. Features. Up to 130% brighter light on the road. View is increased by up to 45 m (130 m) 20% whiter light (3700 K) Maximum light, maximum life (reliable service life of up to 450 hours) Also available as a practical travel set at a reduced price. (Order no. 10031131 plastic box with Philips X-tremeVision moto H4, a 21/5 W tail/brake light, a W5W parking light bulb and a 10A fuse). Important This high-power halogen bulb gets very hot. So when installing it, never touch the glass with your bare fingers, as grease and dirt from your skin will impair heat dissipation and reduce the life of the bulb. Always use a clean, grease-free cloth or paper handkerchief for gripping the bulb. For extra-long bulb life, you can install an inexpensive electronic protector to prevent damage caused by voltage spikes.