A recent test conducted by the European Union-funded outfit ComplianTV found that Samsung TVs seemed to be more energy efficient under tests than in the real-world, prompting accusations Samsung was gaming the system.
ComplianTV found that the motion lighting feature (which is designed to reduce brightness and thereby energy consumption by activating when motion on screen is detected), is only activated during testing. While they could not prove this was intentional, their report indicated this was most definitely a suspicion.
Samsung "firmly rejected" the notion it has done anything to fudge the numbers. In a blog on its website, the company reminds that it introduced motion lighting across all of its TVs in 2011, and arguably implies the discrepancies are a product of technical failure on the part of ComplianTV, saying, "If the customer chooses to alter their display settings or switch to a different mode then the feature switches off, which gives our customers a simple choice of whether they choose to prioritise power efficiency or performance in their TV."