Functional light with substantial energy savings Philips Halogen Low Voltage Capsules provide sparkling, white light. These lamps offer an average rated life of 3,000 hours making them perfect for undercabinet or desk lamp lighting. The huge variety of bulb shapes, sizes and bases means you’ll always be able to find the right bulb to fit your needs and existing light fixtures. Halogen bulbs are fully dimmable and give clear, high-quality warm light that sparkles. No need to warm up as the bulbs come to full brightness instantly. And, they are up to 30% more efficient than standard incandescent bulbs.