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Why buy Philips X-tremeUltinon LED gen2 Headlight Bulbs H4 (Twin)? | The Philips X-tremeUltinon gen2 is able to produce a magnificent light, up to 250% brighter than standard, while retaining a classic cool white LED light with a colour temperature of up to 5800K. Such an expansive projection heightens your presence on the road and means you notice hazards and obstacles much earlier. Meanwhile - owing to Philips' use of premium Lumileds LUXEON Altilon SMD LED chips - the X-tremeUltinon gen2's crisp white projection achieves a look of supreme style. | By implementing their patented heat-management and cooling technologies (AirFlux and AirCool, respectively), Philips have designed a bulb capable of defending itself against extreme weather and overheating. This, alongside the bulbs' durable, shock-proof design and energy-efficient LED technology grants you an amazing bulb lifespan of up to 12 years. | PLEASE NOTE: These headlight bulbs do not have ECE approval for use on public roads: their usage is limited to 'off-road' applications. In addition, they may trigger a bulb error message on the vehicle's dashboard. This is a harmless side-effect of low-wattage LED bulbs and can be solved with the installation of a CANbus adapter. | | | Features and benefits | 5800K colour temperature | 250% brighter than standard halogen | Longlife design with heat-resistant AirFlux and AirCool technologies | Original Equipment Quality components - Lumileds LUXEON Altilon SMD LED chips | Up to 12 years lifetime | SafeBeam technology for perfectly placed projection Stylish white light effect - close colour match to daylight | May require additional installation of CANbus adapter (to resolve dashboard errors / flickering lights) | Simple to install | Not road legal