Flashlight bulbs–filament type Welcome to BFSU: › Forums › Volume Two › Learning Progression āCā: PHYSICAL SCIENCE, ENGINEERING AND TECHNOLOGY › Lesson C-13. Electricity I: Electric Circuits, Switches, Conductors and Non-Conductors › Flashlight bulbs–filament type This topic has 0 replies, 1 voice, and was last updated 5 years, 9 months ago by Bernard Nebel. Viewing 0 reply threads Author Posts March 18, 2019 at 2:56 pm #7499 Bernard NebelKeymaster A material you will need for this lesson, which is not easy to find, is the old fashioned filament type flashlight bulbs. They may be obtained at: Author Posts Viewing 0 reply threads You must be logged in to reply to this topic.