Originally Posted by eric3316
Not to start a plasma vs. LED war but my 60" Plasma is rated at $29 a year vs. a 55" LED at $14. Not a reason to pick one over the other since newer plasma's are much more efficient with energy.
Your TV is not that bad. How much is your picture effected in dark scenes. That is what really matters now how the screen looks with no picture.
The energy guide rating are based off what the tv draws on a default setting. Unfortunately, for plasma this is with stupid energy settings enabled that make the picture too dim. (This can be true with LED too but calibrated settings on LED do not draw that much more energy than the default) If you read the few reviews that bother to test energy usage once calibrated, energy draw for plasma is still about 2.5-3 times of an equivalent size LED (testing showed about 250-300 watts for plasmas in a 50" size vs about 100 watts or less for the LED). Plasmas are more efficient than older models but not anywhere near LED. With that said, it still only equates to about a $25-$30 difference in annual energy cost so it becomes more about environmental conscience than that much savings to your pocket book.
In regards to the OP's original questions, yes this is quite normal and as others have pointed out, it is a flaw of LED edge-lit that can majorly affect picture quality. If you have to go LED and the flashlighting is bothersome for you, you might want to check out some of the newer direct-lit models as they can be better in regards to this type of problem. Otherwise, plasma is still top dog for overall PQ.
For those curious, here is the energyguide testing guideline for on mode (In a nutshell by setting default settings on the set low enough, manufacturers can cheat a little bit and get a better result on the label):
1) Power measurements shall be performed with the product in its as-shipped condition for the
duration of On Mode testing, with all user-configurable options set to factory defaults, except as
otherwise specified by the test procedure.
2) Picture level adjustments shall be performed per the instructions in IEC 62087, Ed. 2.0, Section
3) Products that include a “forced menu” upon initial start-up shall be tested in “standard” or “home”
picture mode. Products that do not include a forced menu shall be tested in the default picture
mode. In the case that no “standard” mode or equivalent exists, the first mode listed in the onscreen menus shall be used for testing and noted in the test report.
IEC 62087 Section 11.4.8 states:
The contrast and brightness of the television set and the backlight level, if it exists, shall be set as originally adjusted by the manufacturer to the end user. In the case that a setting mode must be chosen on initial activation, the “standard mode”or equivalent shall be chosen. In the case that no “standard mode” or equivalent exists, the first mode listed in the on-screen menus shall be selected. The mode used during the test shall be described in the report.