Replacement for Bell & Howell 256 Light Bulb by Technical Precision - Amazon.com
GE 70136 - DHT Projector Light Bulb - Amazon.com
Changing the projector bulb at the movie theater I work for (in half the plastic casing so it doesn't bump anything and become a hand grenade) : r/pics
What Are the Mini Projector Bulbs and How to Choose?