These undercabinet lights use Xelogen bulbs, which contain 99% Xenon gas.
They use less energy, are rated for over 10,000 hours, have a low operating temperature, are resistent to shock and vibration and emit a cleaner, warmer light that appears more like daylight than flourescent.
They have a low, sleek profile, and are not visible under most cabinetry.
They are easy to open and have a high-low-off switch.