subject: Comparing Incandescent, Led And Hand-crank Flashlights [print this page] The flashlight's basic format has not changed much over the last 100 years. Conrad Hubert received the first patent for a flashlight in 1902. Like today's flashlight, his canister-shaped design could be held in one hand and featured a simple on-off switch. By adding new features and improving the bulb and the power source, modern scientists have improved the technology inside flashlights while maintaining Hubert's external structure.
Today's flashlight designs are usually categorized in two ways: by their typical use, and by the type of bulb they require. Below is a sample of the flashlights available on the market and what makes each type unique.
INCANDESCENT
Generally the least expensive type, incandescent flashlights are reliable in everyday scenarios, such as rummaging through closets, looking under beds, and completing home projects. Bright enough for basic use, incandescent flashlights are not nearly as bright as some other bulb options. Because incandescent bulbs require a lot of power, flashlights with this type of bulb must have their batteries replaced often. Incandescent flashlights are no longer recommended for emergency use, as they are not the brightest bulbs available. Finally, although incandescent bulbs have been around for a while, they're quite inefficient, and may lose as much as 98% of their energy to heat.
LED
LED flashlights are highly recommended for emergency use - fire and rescue situations, car emergency kits, home disaster preparation kits, outdoor survival kits, etc. The color of traditional LED light is blue, but white LED lights are now more prevalent. These bulbs are very durable, need very little power to run and have a shelf life of about 10,000 hours. The technology in these lights also lends itself to all sorts of additional features like dimming, shifting colors, and scope changes. Because they are more efficient than incandescent bulbs, LED bulbs stay cool. This means that more energy is used to create light, rather than heat the bulb.
HAND-CRANK FLASHLIGHTS
One great innovation in flashlights is the no-battery models now available for disaster preparation kits. These lights are charged up by either cranking or shaking the unit. Some models can operate for up to an hour for every minute of cranking that is added. Others can even be used to recharge smaller electronics like a cell phone or iPod. Typically, these lights use one or several LED bulbs.
COMPACT FLASHLIGHTS
Many major flashlight manufacturers have created conveniently small torches. Small, pocket-sized flashlights are very popular for keeping on the nightstand, on a keychain, or in a purse. These lights are typically easy to use with a simple on/off button, and they put out just the right amount of bright light for quick and easy use.
The flashlight has a history spanning over 100 years. There have been significant advancements in the past 10 years that allow flashlights to remain a close and portable companion. The styles and designs even allow these flashlights to retain some of the same personality and character of their users. Take the time to get to know your options and determine what flashlight design will suit your needs best.
