As an expert in the field of electronics and energy efficiency, I can provide a detailed analysis of the power consumption of plasma TVs. Plasma TVs, which were a popular choice for home entertainment in the early 2000s, are known for their vibrant colors and deep blacks. However, when it comes to energy consumption, they have been a subject of concern.

Firstly, it's important to understand the technology behind plasma TVs. Plasma TVs use a matrix of tiny cells filled with a mixture of noble gases, typically a combination of neon and xenon. These cells are sandwiched between two layers of glass, and when an electric current is applied, the gases emit ultraviolet light, which then excites the phosphors on the front screen to produce visible light. This process requires a significant amount of power.

According to the Wall Street Journal, a 42-inch plasma set can consume more electricity than a full-size refrigerator, even when the TV is used for only a few hours a day. This high energy consumption is due to the fact that plasma TVs need to maintain a constant flow of electricity to keep the gas in the cells excited. This is in contrast to LCD TVs, which use less power because they don't require a constant charge to maintain the image.

However, it's also important to note that the energy efficiency of plasma TVs has improved over the years. Manufacturers have been working to reduce power consumption by improving the technology and design of the sets. For instance, newer models may have more efficient phosphors, better gas mixtures, or improved power management systems.

When comparing plasma TVs to LCD TVs, it's not entirely accurate to say that a 42-inch LCD set requires about twice the amount of electricity as a plasma set. In fact, LCD TVs are generally more energy efficient than plasma TVs. The misconception might arise from comparing older models of each type. Modern LCD TVs, especially those with LED backlighting, consume significantly less power than plasma TVs.

Furthermore, the energy consumption of a TV is not only about the technology used but also about the size and settings. Larger TVs naturally consume more power, and settings such as brightness and contrast can also affect how much electricity a TV uses. It's always recommended to adjust these settings to a level that is comfortable for viewing while also being mindful of energy consumption.

In conclusion, while plasma TVs were known for their high energy consumption, especially in older models, advancements in technology have led to improvements. However, when considering energy efficiency, LCD TVs, particularly those with LED backlighting, are generally a better choice. It's also crucial to consider the size of the TV and the settings used when evaluating power consumption.

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According to the Wall Street Journal, a 42-inch plasma set can consume more electricity than a full-size refrigerator -- even when that TV is used only a few hours a day. ... But the WSJ notes that A 42-inch LCD set, a typical upgrade item, requires about twice that amount of electricity.Jan 2, 2008read more >>