"If your workspace wasn't originally designated as an office, you might lack adequate lighting. Ideally, your home office should have natural light as well as task lighting, which provides focused lighting to a particular area, and ambient lighting. When choosing office lighting, consider an adjustable desk lamp with multiple color temperatures. Studies show that warmer light (skewing more yellow) enhances creativity, while cooler light (shades of blue) increases concentration. There's even evidence that lighting can play a role in decision-making."

Read about the other 6 here