An LED bulb uses very little electricity.
LED灯耗的电，特别特别少。
It turns almost all power into light.
它几乎把电全变成了光。
Old bulbs turn most power into heat.
老灯泡呢，把大半的电都变成了热。
Touch a lit old bulb, and it burns your hand.
摸一下亮着的老灯泡，烫手。
LED bulbs stay cool and shine brightly.
LED灯不烫手，还亮堂堂的。
That is why they save so much power.
这就是它这么省电的原因。
