Cool Light with LED Flashlights

I bought my first LED flashlight almost ten years ago. It was a thumb sized keychain with a button-cell battery. Since that time, LED flashlights have evolved and new models have brighter lights and more LEDs.

Light-emitting diodes or LEDs are solid-state transistors which give off light when power passes through them. However unlike incandescent bulbs, it has no filaments, and no bulbs. It doesn’t burn, nor create much heat. And best of all, it eats up a minuscule amount of power.

The small energy footprint makes the LED flashlight a very novel proposition. It doesn’t have to use a large battery to produce light and it doesn’t generate lots of heat either. And since it’s a single diode, it has a long life span.

Although normal LEDs come in all colors, the diodes used in flashlights tend to have a bluish tinge. This is not really a hindrance to having a luminous flashlight. In fact, currently there are small projectors which have LEDs for the lighting element.

The rechargeable LED flash light come in different sizes. There are the keychain models which are smaller than a finger, with larger units using banks of LEDs. Using banks LEDs, the size of a lighting unit can be as large as any normal flashlight, with a wide range of designs. There was even a flashlight which make use a circular group of LEDs for a flashlight torch making the reflector unit, with a rectangular bank on the side but without the reflector unit. This is great when camping, replacing portable battery powered fluorescent lamps.