Why LED lamp ?
1. Current white LEDs will last up to 50,000 hours, about 50 times as long as a 60-watt bulb. That's almost six years if they're on constantly.--- Long life.
2. That makes them attractive for places where changing bulbs is difficult or expensive - like on the outside of buildings or in swimming pools.--- save maintance cost.
3. Hotels are interested in using LEDs in bedside lamps to save them the trouble of replacing burned-out bulbs,--- save maintance cost.
4. LEDs are also durable. Being solid-state, they can resist the vibrations in aircraft and cars --- Hard environment.
5. "On a very hot day you might want blue light to cool it down a bit, or on a winter day you may want to simulate sunlight," --- color changing.
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