Safe light - Photographic paper, unlike film, is designed to be handled under certain colored, dim lights, known as safe lights, without adversely affecting the paper. Nonetheless, printing paper should be kept in the dark as much as possible, and should not be brought nearer to safe lights than is absolutely necessary. Make sure you are familiar with the manufacturers recommendations for safe distances, and never use a bulb that is brighter than recommended to avoid "fogging" the paper.