The flashlight or torchlight as it is called in some countries is an indispensable device in all homes.
The flashlight has seen a series of developments starting from the end of 19th century. The flashlight of the early stages with acid filled batteries and bears no comparison to the present day LED Flashlight. Flashlight as handy device that could be commonly used everywhere after the dry battery was developed. These flashlights have been in use for last 7 to 8 years with varying degrees of appreciation till the LED Flashlight came along. The LED technology has not been fully developed for universal use because flashlight has over the years have found multifarious applications. They have become indispensable for all professionals, law enforcing agencies, armed forces, apart from homes. The construction and size of the flashlight is also dependent on where it will be used. The use will decide the number of battery cells that will have to be used because the requirement of illumination differs from one application to another.
There is no denying the fact the LED Flashlight has come to stay and like the PC and laptop the day is not far off when you will find that technologists have been able to bring out an LED Flashlight that an average man can purchase at affordable price. However, the versatility of the present day battery cell operated flashlight cannot be questioned and it will take quite some time before an LED Flashlight can completely replace the flashlights in use at present. Battery cell manufacturers have taken great pains to bring out battery cells of various sizes suitable for different applications. An example is the development of pen torch cell. The pen torch gives you the facility of carrying it in your pocket and using it for close examination of any object with better focused light.
The greatest disadvantage of the flashlight is the life of the bulb. It is a miniature incandescent lamp and gets fused at all the wrong moments. It is particularly so in the case of big flashlights using more than four cells with two bulbs. These flashlights are mostly used in the industries. The users will have to carry spare bulbs. An LED Flashlight is thoroughly dependable device not involving the use of an incandescent lamp. The dispensing with incandescent lamp also gives you better comfort in using the LED Flashlight because you are not subjected to the heat generated by the bulb. As the name implies the LED Flashlight, LED emits its own light as it is basically a semiconductor charged with electricity.
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