Darkroom Bulb Toshiba Darkroom Bulb for Panchromatic Film Development, etc. *This is for film development. It is not for photographic paper. Also, to prevent fogging during film development, it emits almost no light. You can see if your eyes get used to it, but it is not recommended for those who are older. Darkroom Supplies Toshiba Darkroom Bulb, Parent-Child Type, 3 pieces Operation confirmed. Stored at home. Although it is quite old, It seems it has never been used. Thank you.