Camera Flash-gun replacement Flash Tube lampsfor use in DSLR pop-up Flash and on-camera FlashGun, Speedlights
There are 2 products.
Miniature Flashtube-Reflector combo, ideal for small devices. Light output is maximized by the reflective parabolic reflector.
Linear Glass Flash tube lamp, Popular model for Timing light. The use of timing lights in garage for engine inspection, wheel calibration, etc.