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wave power is efficient.
An incandescent bulb is 96% efficient as a heater, and 4% efficient as a source of light. A fluorescent bulb is only 60% efficient as a heater, and 40% efficient as a source of light. An LED bulb is only 10-20% efficient as a heater, and 80-90% efficient as a source of light (but that light is usually unidirectionally directed... harder to do diffuse lighting with them).
No, no machine is 100% efficient.
You can go to www.energysavingtrust.org.uk/myhome to read about inexpensive, energy efficient Lighting . Another good website is www.green-energy-efficient-homes.com/energy-efficient-lighting.html
To be efficient means to be quick and effective at a job or task.
you are stupied
Efficient (Adj) It means able to produce effect wanted without wasting time or energy.
efficient
efficient time
"More bang for your bucks"
Smart material is energy efficient.
I think it means that the business works well
American Council for an Energy-Efficient Economy
Using personnel in the most efficient manner possible.
Capáx or Peritús are the words which mean efficient in Latin.
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