Vintage old stock flash bulbs made in Japan. Exploding very brightly!
Direct use - can use them as flashlight for photo, other use - create visual effects, DIY like made in cinema film "Man in black" memory clear effect )), signal purpose and temperature heating effect of bulb can also use for warming something.
Also there is possibility to use this bulbs in one-time powerful pumping of solid laser Nd glass Nd:YAG.
5 bulbs in a pack.