While businesses have always been careful about how much they spent on electricity, today’s displays are making it a lot easier to keep bills lower — and the environment safer.

For example, I measured a four-year-old 27-in. Apple Cinema Display as using 101 watts of power. However, the three 27-in. displays that I’ve tested in this roundup of environmentally smart monitors — AOC’s E2752VH, Dell’s UltraSharp 27 UZ2715H and the Philips 271S4LPYEB — use an average of 26.4 watts.

This is also reflected in cost in electricity to use the monitor per year. Assuming the display is used for 10 hours every business day and that power costs 12 cents per kilowatt-hour (the national average), the Apple Cinema display costs $29 for the year while the three reviewed here average an annual cost of $9.32. Doesn’t sound like a lot, but if you’re a business with a couple of hundred employees, it can add up quickly.

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