LCD TVs: LEDs vs CFL

[niel]

i thought so too russ, but again it can't easily be categorized by type anymore as one needs to investigate all types to know what's best as was proven to me seeing that 42in plasma being rated at 99w. this is about 20w more than mine runs at and mine is a 32in lcd.

[waynefromnscanada]

I've read recently that the plasma manufacturers have gotten serious about power consumption because of the bad name they had in that regard, and are now dong much better in that area. Time for the rest of them to do the same, especially the LED units should be able to do much better, especially when the brightness is reduced. For starters, dim the LEDs instead of driving them wide open and blocking the light with the LCD when we select a dimmer screen. Reminds me of where I once worked. In winter they turned up the electric heat to the max, then controlled the temperature with the AC and wondered why the power bill was so high. DUH!

[vcallaway]

The Plasma my sister bought draws 600 watts!!! I thought something was wrong with the kill-o-watt.

Our 27" tube TV only uses 50 watts.

The Vizio LED TV's we bought for the motorhome are 22" and 19". They are around 30 watts when on A/C. I suspect it is less now that I have them connected directly to battery. The transformers ran pretty warm which means wasted energy. I probably should put a meter on and see what the DC load is.

There seems to be a dramatic change in TV power needs once you get over 27". We tested quite a few at Costco. Everything 27" and under was pretty low, once you made the jump it went over 100 watts and up.

I also should share this little story.

In December we were taking advantage of the sales to replace the TV's and DVD player in the motorhome. We wanted low power consumption and 12v if at all possible. We walked into a Video Only store and asked if they carried Vizio. I was greeted with a tirade on why I don't want one. They obviously don't carry them.

Ok, so I asked if they had any Blu-Ray players that ran on 12v or at least used a wall-wart type power supply. I was informed that there was no way you could power a Blu-Ray player on 12v. That the laser drew so much power on startup that like a laser printer you could not even run it on a UPS.

Wife and I just looked at each other with a *** is wrong with this guy look.

We wound up buying the 22" TV at Costco ($180), the 19" at Target ($140) and the Blu-Ray from Wal-Mart($85). The Blu-Ray draws 20 watts max. The guy must use a really small UPS

[JESSICA]

I recently saw this one:

Sony KDL EX 40 600 (40"). It is a LED tv. 105 watts max. Can be adjusted down to around 80 watts.

[jagec]

Bill:

Are you sure this is correct?

My old 32 inches Sony WEGA ( tube) draws around 156 watts, while a new 46 inches Sony EX 710 (LED) consumes around 117.

Yeah, but that's LED.

My 42" Panasonic (LCD with EEFL backlight) uses around 200 watts. Now that I'm looking it up, I do find quite a few plasmas of that size or bigger which use less. Mind you, most of the older ones use significantly more.

[PhilS]

Yeah, but that's LED.

My 42" Panasonic (LCD with EEFL backlight) uses around 200 watts. Now that I'm looking it up, I do find quite a few plasmas of that size or bigger which use less. Mind you, most of the older ones use significantly more.

I bought a 42" Panasonic Viera LCD last summer (not LED backlighting) and Kill a Watt shows it consuming 80 watts. I do have the backlight turned down to a comfortable level.

I haven't measured the heat tho, since that was the original question.

Phil

[BB.]

Basically, 80 watts into a TV = 80 watts of heat.

154 lb human output, roughly, 65 watts.

You do the math.

-Bill

[PhilS]

I haven't measured the heat tho, since that was the original question. Phil

I used my infrared thermometer last night in an attempt to find part of the answer to the question.

The room temp was 70 (up from 60 a couple of hours before. The TV had been on for that same two hours.

Feeling around with my hand, the warmest part was on the top about 3/4 of the way across from the left. It measured 97F. Other random measurements all over the set varied from 74 to 81.

Again, LCD Panasonic with CFL backlight (or whatever it's called, NOT LED which is what I was wanting but my friend owns the store and this is the best he had without going to plasma).

Phil

[DavidOH]

Great subject for discussion.
The LED ( Light Emitting Diode ) -vrs- CCFl ( Cold Cathode Florescent Light )

I ran across a few items in my search for a 12 volt computer monitor.
This website lists a few: http://islandtimepc.com/12voltmonitors.html

That got me searching for others.
There are a number of TV's that look pretty good:
Visio has several:
At WalMart.com: http://www.walmart.com/ip/Vizio-M220MV/15410929
Power Consumption
On Mode Power: 26W
Standby Power: 0.6W
Estimated Annual Energy Consumption: 51kWh*
Estimated Annual Cost: $5.73**
Also available at Sam's Club
The same power supply fits several models: http://tinyurl.com/4cte86v


I have been checking for 12 volt desktop monitors and I think I have found a winner.
There are a LOT of choices but I've narrowed the criteria to several things:
- Highly rated by others 4 stars or better,
- Fast response time of 2ms, (Many more are available at 5ms)
- 19 to 27 inch screen - 1920x1080 minimum (1080p High Definition)
- Under 30 watts (the lower the better)
- DC input without any modifications (no AC connection required)
- Reasonable Price <$350 smaller monitors <$250

Samsung has several LED lighted LCD monitors with (12volt) external power supplies. Highly rated and very competitive prices.
Acer was DC input but I'm not sure of the voltage. Samsung was clearly marked on the monitor "DC 12V"

Here are a couple choices:
23" about 25 watts .3 watts on standby ~$290
http://www.newegg.com/Product/Produc...82E16824001414
(or the BX2331 similar specs lower price)

The Winner! : 21.5" ** 18 Watts ** .3 watts on standby ~$180
http://www.newegg.com/Product/Produc...82E16824001444

available at Amazon.com for a couple bucks less with FREE shipping.
Other contenders:
Asus - ML248H - 24" - <30 watts - ~$210
Acer - S273HLbmii - 27" - <22 watts - ~$350
Acer - S234HLbmii - 24" - <17.2 watts - ~$250

[waynefromnscanada]

Great subject for discussion.
(or the BX2331 similar specs lower price)

The Winner! : 21.5" ** 18 Watts ** .3 watts on standby ~$180
http://www.newegg.com/Product/Produc...82E16824001444

Very interesting. Thanks for sharing.