Which? researchers have seen a dramatic decrease in TV power consumption in 2009, with LG and Samsung models leading the field.
In the current batch of TVs being tested at the Which? lab, the 42-inch LH2000 from LG has received full marks for its green credentials.
The 40-inch Sony WE5, a model marketed as an Eco TV, also fared very well in our power consumption tests and boasts a range of ‘Eco’ features, but it didn’t quite score as well in our energy efficiency tests as its larger, LG counterpart.
Energy efficient TVs
Both models typically use around 90 watts when switched on (the Sony model uses slightly more than the LG model), which is around half that of the average 40-inch models tested over the last two years. When set to their highest power saving modes, the energy consumption of the Sony WE5 drops to just over 60 watts, while the LG LH2000 model reduces its power consumption by less than half to around 41 watts.
Both models feature ‘hard’ off switches to ensure that they don’t drain any power when switched off, and both models have a screen blanking option, which darkens the screen when listening to a radio station. In the screen blanking mode, the Sony WE5 consumed 48 watts, while the LG dropped its consumption as low as 16.3 watts.
The Sony WE5 boasts several other ‘green’ features that the LG model doesn’t have. The Sony engineers have incorporated a couple of sensors into the LCD TV: firstly, a sensor that switches the TV off when left in standby for too long; and secondly, a sensor that switches the picture off when it detects that there is nobody in the room.
Energy saving functions
The Sony model also features a quick-start standby mode. When in this mode, the TV can be switched on quicker, but only a matter of a few seconds are saved. Which? researchers feel that the extra expense of power used when in the quick-start mode is wasteful, and is not offset by a couple of extra seconds of viewing time.
Michael Briggs, Which? TV expert, said: ‘Both the WE5 and the LH2000 are great choices for people looking for an energy efficient TV, and in general, the power consumption of TVs has dropped rapidly this year across all formats and screen sizes. The full results of these models, including picture and sound quality results, will be published on 17th July.’
Check out our full reviews of more than 250 LCD and plasma TVs in our in-depth LCD and plasma TV reviews, where you can find out how the power consumption of all our tested TVs translates into cost per year on your electricity bill.
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