Many highlighters have bright and fluorescent colors, and will emit fluorescent colors under the night light. The most common color is yellow, and other colors include pink, blue, green, orange and purple.

In addition, there is a dry fluorescent pen, which has no felt tip, but has a special opening to stick the fluorescent strip in the pen to the document, just like a tape. This kind of fluorescent pen is not as easy to clear as the traditional one.