Small reading lamps. Desk lamps are task lamps giving extra light when needed for tasks such as reading and sewing. Some traditional styles such as bankers lamps are very decorative too. Invest in a task table lamp in your work space.
Consider plug in wall lights to create additional ambient light that can easily be positioned to prevent any glare from your screen.
Desk lamps with adjustable shades are great too, along with floor lamps and adjustable ceiling spotlights.