This is from the MPix Pro site:

1. Viewing Environment

Your work environment influences how you see color on your monitor and on printed output. For best results, control the colors and light in your work environment.

• View your documents in an environment that provides a consistent light level and color temperature. For example, the color characteristics of sunlight change throughout the day and alter the way colors appear on your screen. If you work in a fluorescent lighting condition, eliminate the blue-green color cast installing D50 (5000° Kelvin) lighting. You can also view printed documents using a D50 light box.

• The amount of lighting is important when working with your images. Create a lighting environment conducive to reading a book – not too dark, or too light. If you have the ability to measure your light, the typical light level should be about 55-60 lux.

• View your document in a room with neutral-colored walls and ceiling. A room’s color can affect the perception of both monitor color and printed color. The best color for a viewing room is neutral gray. Keep in mind, the color of your clothing reflecting off the glass of the monitor may affect the appearance of colors on the screen.

• Remove colorful background patterns on your monitor desktop. Busy or bright patterns surrounding a document interfere with accurate color perception. Set your desktop to display neutral grays only.

• View document proofs in the same real-world conditions that your client will view the final print(s). For example, you might want to preview a portrait under incandescent lighting (typical lighting in most homes).