http://reviews.cnet.com/green-tech/tv-consumption-chart/
In this list, the Sony KDL-52NX800 52" LED only consumed 95W on average (calibrated), versus the 294W on average (calibrated) for the 50" Panasonic TC-P50V10. Both are full HD TVs, with the Sony actually having a size advantage.
CNET follows the 10-min test based on IEC while the Japanese Energy Conservation Policy standard testing procedure is for 24 hours (4.5 hours running + 19.5 hours standby), updated as of April 2010. All makers are required to have their HDTVs tested under exactly the same conditions and results informed to the public as part of the national program.
One practical solution is to try to ask someone who owns either an LCD or a Plasma to observe their monthly kWh consumption before and after buying. It's more inaccurate of course, and quite difficult to determine data swings as any of these HDTV would not really consume as much as your fridge or the aircon /heater or the iron under normal household conditions. Ive tried that everytime I bought a new TV - couldnt tell any difference really.
Anyone here got the shock of their life with Meralco's kWh readings the month following their HDTV purchase?
BTW, tigasin tip. This one was brought to my attention by my wife - and it seems to be true at least in our house. For some reason, bakit hindi madaling kapitan ng alikabok ang plasma panel compared to LCD and CRT? hahaha. Ang dali linisin. Lalo na ang CRT, kakapunas ko palang, meron na ulit alikabok. hehehe