High-end sets with LED backlights (as opposed to fluorescent backlights) are incredibly energy efficient and physically much lighter and thinner than plasma displays.

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The HP ZR2740w, ZR2440w, ZR2240w and ZR2040w displays come with light-emitting diode (LED) backlights for a slim industrial design, more robust colors and the elimination of mercury.

ENGADGET: HP goes display crazy, unveils eight new models, four IPS panels (hands-on)