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Thread: Does anyone have a 32"-40" TV and a Mains Power Reader?

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    HEXUS.timelord. Zak33's Avatar
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    Does anyone have a 32"-40" TV and a Mains Power Reader?

    As per the title really....

    I'm interested in the power draw while in use to compare to a selection of CRT TV's vs LCD and Plasma's

    We've got an old 28" Philips CRT in the living room and being a CRT is uses more electricity when showing bright light that dark scenes, but it varies from 75W to 120 W

    Would be interested in any results you guys could come up with please.

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    Re: Does anyone have a 32"-40" TV and a Mains Power Reader?

    I could see if I could get my hands on a mains reader and get you some figures for the 37" Samsung TV I have.

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    Re: Does anyone have a 32"-40" TV and a Mains Power Reader?

    Got one, I'll go do it now.
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    Re: Does anyone have a 32"-40" TV and a Mains Power Reader?

    2W when in standby, 95W in use. It'll go up slightly as it warms up, so let's say 100W. I don't think the backlight is on full, either.

    I have an 32" LG Scarlett 32LG6000.

    It's a luccerdetuv.
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    Re: Does anyone have a 32"-40" TV and a Mains Power Reader?

    My 40" JVC uses around 220-250w depending on the brightness.
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    Re: Does anyone have a 32"-40" TV and a Mains Power Reader?

    I did a comparison last year just to see, and our monster Sony WEGA 32" CRT uses 160W (using mains tester), which I compared to the official stats for the latest Samsung 32" which uses 185W. I compared a few other sizes (obviously smaller as they don't do 40" CRTs) and the difference was pretty much equivalent to the findings on mine...
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    Re: Does anyone have a 32"-40" TV and a Mains Power Reader?

    so, they're not more efficient then? The reason I thought they might be less power ungry was heat. Most LCD's seem cooler than my CRT.

    Quote Originally Posted by Advice Trinity by Knoxville
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    Re: Does anyone have a 32"-40" TV and a Mains Power Reader?

    Quote Originally Posted by Zak33 View Post
    so, they're not more efficient then? The reason I thought they might be less power ungry was heat. Most LCD's seem cooler than my CRT.
    Not generally, seems to be a bit of a misconception, people assume that because they're thin and flat that they're more efficient, but not the case. CRT's use a fair surge to turn on, but then keeping it on is relatively low power in comparison. Whereas with LCD's the power is mostly used by the lamp which needs to be on all the time in order to see what's on the screen. Once OELD gets affordable, THEN we're talking energy efficient.

    For comparison:
    • Panasonic 28" CRT operates at around 85W
    • The Standard entry Sony Bravia 40" LCD runs at 150-180W sort of range
    • The new Sony Bravia Energy Efficient LCD range has a 40" with a running power consumption of 88-125W - which it achieves using smart software, so dimming the screen according to the amount of light in the room, or turning the screen off if you leave the room (motion sensors)
    • Alternatively the Samsung LED TV's work using LCD panels but illuminated by LEDs rather than a flourescent tube, the 40" runs around 100W
    • The next step is where LED lit LCDs can adapt the brightness of areas of the screen independantly.
    • OLED is coming though, and while at the moment the largest screen is the 11" Sony (at £3k) the estimates are that once scaled up they will still be around 30% more efficient than the most efficient LCD - finally better than a CRT
    Quote Originally Posted by The Mock Turtle
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    Re: Does anyone have a 32"-40" TV and a Mains Power Reader?

    Not sure if LCDs work like plasmas but on a plasma the picture on the screen can have a huge difference in the amount of power the screen draws.

    IIRC my Panasonic 50" plasma draws ~300W with a solid white image and about ~75w with a solid black screen.....normal usage is anywhere between the 2 values.
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    Re: Does anyone have a 32"-40" TV and a Mains Power Reader?

    Quote Originally Posted by shaithis View Post
    Not sure if LCDs work like plasmas but on a plasma the picture on the screen can have a huge difference in the amount of power the screen draws.

    IIRC my Panasonic 50" plasma draws ~300W with a solid white image and about ~75w with a solid black screen.....normal usage is anywhere between the 2 values.
    Even more so with the good (read:latest) LED lit LCD screens as black is represented by turning the led(s) off - also has the advantage of being actual black
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    Does he need a reason? Funkstar's Avatar
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    Re: Does anyone have a 32"-40" TV and a Mains Power Reader?

    Quote Originally Posted by Barakka View Post
    Even more so with the good (read:latest) LED lit LCD screens as black is represented by turning the led(s) off - also has the advantage of being actual black
    Also the various "dynamic contrast" techs will help in this regard too. They vary the power of the LEDs across the screen to help improve the dynamic range.

    I don't have a power meter or I would test my 42" Hitachi LED LCD for you

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    Re: Does anyone have a 32"-40" TV and a Mains Power Reader?

    I seem to be using 1w in standby and 180w when I run it in Game mode with the 360, watching freeview thats built into it it seems to read around 125w.

    So I would say I am in the 180w range as the 37" is essentially used for the 360 and then watching movies from the PC. I don't watch a lot of TV so I will probably look at a smaller 32" samsung to put in the front room.

    EDIT:

    Just tested the Samsung T220 Monitor I have and that doesn't even read on the Kilowatt meter so I guess the 0.3w standby claim from Samsung is true (or near enough) and runs at a max of 25w it seems when I am at the desktop.
    Last edited by Grey M@a; 21-09-2009 at 03:01 PM.

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    Re: Does anyone have a 32"-40" TV and a Mains Power Reader?

    According to the Hitechi manual, peak power is 230W, standby is 0.8W.

    0.8W already beats the next round of power requirements from the EU for devices with a screen (currently 2W, soon to be 1W).

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    Re: Does anyone have a 32"-40" TV and a Mains Power Reader?

    Quote Originally Posted by Zak33 View Post
    so, they're not more efficient then? The reason I thought they might be less power ungry was heat. Most LCD's seem cooler than my CRT.
    No mate, I was always under that impression and was quite horrified when I saw how much it uses, this is after going round and checking all my stuff with the meter, making sure all my bulbs are energy saving, draft proofing, insulating and then running a bleedin' telly that consumes the same amount as a small African village.

    I was looking at plasmas, but they are only marginally more efficient and the new "energy efficient" ones were silly money last time I looked, so much so, that it would take around 10 years or so to recoup the extra money spent on it, off my bill.
    Quote Originally Posted by Blitzen View Post
    stupid betond belief.
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    Re: Does anyone have a 32"-40" TV and a Mains Power Reader?

    Clunk... good input...in fact , thanks to you all

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    Re: Does anyone have a 32"-40" TV and a Mains Power Reader?

    36" Panasonic CRT - 95w-110w. Modern technology... pah

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