The efficiency of LED HDTVs are that the light source will never go out or fade like LCD televisions. They do not need replacing and the TV will be as bright as ever.
There are many website available that explain the differences between LCD and LED HDTVs. Try this we blink at http://lcdtvbuyingguide.com/HDTV/led-vs-lcd.html
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LED HDTVs range in price depending on brand, size and capability, but you are usually looking at around $400 - $1500 for an LED set. You should compare prices at your local electronics store.
The two types of televisions use different technologies to light up their screens. Price is also different, with LED TV's being less expensive the HDTV's. You cannot get a flat screen LED TV, but you can with HDTV models.
There are many types of widescreen HDTVs and some are superior for different reasons. There are LED, LCD and Plasma and all are very superior HDTV brands.
Iy should come with most but you'll want a drill and a stud finder.
When you totally switch to LED light bulbs: 80% on energy savings and an average of 40% for all lighting.
I do not own any 50 inch HD televisions, however I am considering buying a Sony Bravia HD television of that size or a Samsung LED television (greater than 50").
The average price for HDTVs is approximately eight hundred to one thousand dollars. The price also depends on such factors as size and brand, for instance.
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The best HDTVs are SONY.
Wal-Mart carries an extensive selection of electronics, including TVs and HDTVs. Panasonic is one of the brands carried in their stores, but you will have to check with your local Wal-Mart to ensure availability.