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Flashlights are handheld, battery powered
lights for use where there is no other source
of electrical power or where power cords
would be inconvenient. They are powered either
by replaceable alkaline batteries or by rechargeable
nickel cadmium batteries, which can be plugged
into an electrical outlet to recharge. Flashlights
come in a wide variety of sizes: larger models
provide more light but are usually heavier.
Most flashlight cases are made from shatter
resistant plastic or a durable aluminum alloy.
Look for the following when buying
flashlights:
- Tiny, high intensity disposable flashlights
can be conveniently attached to a key chain
for close illumination, such as finding the
slot for a key, but are of little use beyond
a foot or more..
- Small, 5 to 6 inch models are easy to carry
in a pocket, briefcase, or purse. These can
have beams that adjust from wide to intense
spots of light.
- 10 to 12 inch flashlights fit conveniently
in the hand. Look for models with on and
off push buttons that have anodized interiors
to resist corrosion and are water and shock
proof. These larger units are designed for
extended use.
- A large flashlight is especially useful outside.
Make sure it has a shatter proof lens. If
you will be using it in a car, boat, or on
a work site, look for a weather resistant
rugged exterior These models usually have
top mounted handles.
- Digital models can provide an ultra bright
focused halogen main beam for up to 15 hours
on a single charge.
- Growing in popularity are LED flashlights,
where a single or a series of light emitting
diodes replace the conventional flashlight
bulb. They provide a highly focused beam
that far outlasts a conventional flashlight
(approaching a 1000 hours).
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