What is the wattage of the bulb used in a safe light?

The wattage of the bulb used in a safe light is typically in the range of 7 1/2 or 15 watts. This lower wattage is important because safe lights are designed to provide illumination while minimizing the risk of exposing photosensitive materials, such as certain photographic films and emulsions, to light that could cause fogging or damage.

Using a bulb with this wattage ensures that the light is dim enough to prevent unwanted exposure while still providing adequate visibility for tasks such as developing or processing photographs in a darkroom setting. It strikes a balance between providing some light for functionality and maintaining the safety of the photosensitive materials.