Penlight facts for kids
A penlight is a small flashlight in the shape of a pen. A penlight usually uses a small light known as an "LED" (Light Emitting Diode) but it can also use a small lightbulb made just for small flashlights.
The LED lights up when power is run through it. Making the penlight light up is as simple as pressing a button, or screwing the end on tighter so it makes contact with the batteries.
Most of the time, penlights use two or three AAA or AAAA batteries. AAAA are a newer, thinner type of battery, most commonly found in small electronics.
Penlights can be made out of plastic or metal, and can be any color. They most often have a little clip, to hold it on your shirt or something.
Images for kids
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A set of LED flashlights
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January 1899 Ever-Ready flashlight ad mentioning the proceedings against the alleged patent-infringing rival companies
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Miniature incandescent bulbs for use in flashlights. The tungsten filament bulb was essential to turn the flashlight from a novelty to a useful tool.
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Multiple 5 mm LEDs may be used in small flashlights.
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A medical halogen penlight to observe pupillary light reflex
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Non-incendive flashlight for use when inspecting areas full of flammable gas
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One style of diver's lamp
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Inspection light with flexible gooseneck mounting for lamp
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IPhone XR Flashlight
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Left to right: 3x AA to D parallel battery converter with rechargeable NiMH AA-size batteries inserted. MY DAY vintage flashlight. It uses 1.5 V D-size batteries. Sofirn SP36 flashlight. It features a 5 V 2 A USB-C charging port to load 3.7 V 18650 rechargeable lithium-ion batteries.
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Dive flashlight with different reflectors and collimator for LED XHP70.2
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A rechargeable, programmable LED flashlight
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