story bent plastic rods or semi-rigid orPosted by shiekh shazia on July 28th, 2016 story bent plastic rods or semi-rigid or flexible tubes containing optical fibers, are available for some flashlights for inspection inside tanks, or within walls or structures; when not required the light guide can be removed and the light used for other purposes. A penlight is a small, pen-sized http://www.dermayouth.org/which-tactical-flashlight-to-choose flashlight, oftreflection or absorption. Very small flashlights may not have a reflector or lens separate from the lamp. Some types of penlight bulbs or small LEDs have a built-in lens. A reflector forms a narrow beam called the "throw", while light emitted forward misses the reflector and forms a wide flood or "spill" of light. Because LEDs emit most light in a hemisphere, lens lights with the LED facing forward or reflector lights with it facing backwards radiate less spill. Variable focus "zoom" or "flood to throw" lights may move the reflector or lens or they may move the emitter; moving the emitter presents the designer with the problem o the headlamp, an angle-head flashlight emits light perpendicular to the length of the battery tube; it can be clipped to a headband, belt, or webbing or set on a flat surface. Some types allow the user to adjust the angle of the head. The Fulton MX991/U Flashlight was an angle-head flashlight issued to US militar http://www.dermayouth.org/which-tactical-flashlight-to-choose Like it? Share it!More by this author |