The light that gives the best quality light lately is LED. It was invented and patented in 1962 when was so expensive like $1,032 in today’s dollars (LED Light Bulbs – Pick Up Best Bulb For Different Rooms). But, today, a quality LED bulb costs like $2.99 which means it is affordable by masses. When you need to buy a LED bulb you need to know how much brightness you need for the room, or what size the room is and what is proper brightness for it.

 

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Studied B.Sc in the major of Transportation Engineering.

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