BLE-LED-100, VIVID UV-A-LED Replacement Bulb. Convert your mercury vapor HID lamp to modern LED technology. Rated life is 10x longer (50,000 hours based on average use) than a mercury vapor HID bulb (5,000 hours based on average use). Instant-On Operation. Over 50% cooler than HID. Less environmental waste with fewer bulbs and energy efficient. Comes with patented bulb saver that keeps bulb upright in housing and maintains alignment through usage, increasing longevity.