Black-coated flash bulbs with which you can take pictures in total darkness on infrared film have just appeared on the market. Army photographers and newsmen equipped with these invisible-light bulbs can “shoot” pictures in air-raid blackouts without fear of exposure of their light, although as an extra precaution the camera may be equipped with a visor shielding the flash reflector. The blackout lamp, which is treated and coated with a special black infrared filter that dries hard and would not be affected by ordinary chemical, atmospheric or mechanical conditions, may find uses in darkened theaters, lecture halls, crime laboratories and the like.