The basic problem solved by the PenLight is the dilemma of how to write in a dimly light area. This device will solve the problem without causing the writer damage to their eyes or sacrificing the quality of the user's handwriting. The PenLight will be able to attach to almost any writing utensil. This device will be useful for teachers, students, movie critics, poets, authors, and nearly anyone who writes. It may also be of great help for some visually impaired persons.

The three major parts of this device are the power source, the light source, and the method of attachment. There is really only one feasible method to power this device, and that is with batteries. Most small flashlights require only one 'AA' battery, which is rated at 1.5 volts. Two watch batteries can be used for the power source. The light source is acquired through an LED. It draws little current, enabling it to be powered by the small batteries that cannot supply much current. The PenLight is attached to the utensil by means of Velcro straps at the top and a metal clip near the hand.

The PenLight performs well under test conditions. It supplies the writer with 5.5 Lumens. A well-lit room also provides the write with 5.5 Lumens at the surface of the paper. In other words, writing with the PenLight is just like writing in a bright room.