We swapped a 75W incandescent bulb for a 100W dimmable LED spotlight and the difference was huge. The LED bulb is much brighter and very "white", which is exactly what we need since this bulb will be used to illuminate the stairs. The dimming function works great too. The lamp dims to a very low light level and produces no noise. The LED bulb has a flatter surface and doesn't protrude from the ceiling mount as much as the old bulb, but that doesn't affect its ability to cast a wide light pattern across the entire staircase. I installed it yesterday and my wife immediately noticed an improvement in light output. It's used on/off a lot so we'll see how it performs over time, but so far so good.
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