Lighting refer to the use of both natural and artificial light sources like lamps and light fixtures to achieve practical or aesthetic effects. Lighting is equally important for touch typing, a typist can perform best in a properly designed light environment. For best overhead illumination working on computer, lower down light level and glare-free ambient lighting. Adjust the excessive or intense lights by turning off or moving some of the light bulbs or fluorescent tubes.
In case you are working in an office, there may be certain rules and regulations where you can position your equipment. At home, you may place your LCD (monitor) such that the window is behind it. Glare from either lighting or sunshine should be avoided. For safety, you can buy a filter to place on the monitor’s screen. The filter may degrade the image quality a bit but can help in reducing strain on eyes. If you need a screen filter, you can Buy one here.