Abstract: Two, redundant, electrical switches in electrical series between a flashlight's battery and its bulb are simultaneously activated by an angular rotation between two sections of the flashlight's case. To implement one of the switches the functions of (i) force biasing and (ii) electrical conduction between a battery's terminal and the flashlight case are separated. Force biasing between battery and case transpires by a spring and washer which are, in combination, electrically non-conducting. Electrical conduction between battery and case transpires by another, separate, spring that is shorter than the force-biasing spring. Further, and independently, a removable and replaceable combination shock-mounted light bulb and reflector assembly includes (i) a wire-lead miniature light bulb of low inertial mass encapsulated within (ii) a shock-absorbing plastic matrix which is further sleeved in (iii) a strong metal which also presents a reflector surface precision aligned to the bulb.