There are many uses for flashlights but one of the most important is that a flashlight increases personal safety in the dark. For example in dark spaces, during power outages, during evening walks and more. Each home should have at least one flashlight in the event of a longer power outage.
Comparing the brightness of different lamp types can be more difficult than you think. The manufacturers’ information often does not take into account the direction of the light beam. Or the design of the luminaire. The brightness can be measured in the units candela, lux or in the lumen, three variables based on each other.
Today, aircraft aluminum flashlights are manufactured, exactly what alloy is used, not specified by the manufacturers. But aircraft aluminum is used because it is heat resistant and strong. Some models are also made of plastic corrosion-proof and can withstand high temperatures.
White heat is recommended when you release the blue light. But “white” also works.
Switch position and function
Normally, the switch is usually located at the back of the flashlight or on the side of the flashlight. The trend is towards most manufacturers placing the switch at the back of the flashlight. When the switch is located on the side of the lamp. It is somewhat easier to handle but is more unprotected which is a major disadvantage in certain applications. The most common type of switch is pressure switch, but there are also switches that you push back and forth. Then placed on the side of the flashlight. With the new technology development of flashlights where many functions are built into the flashlight. The switch button has been extended function.
LED vs light bulb
When comparing different light sources it may be worth remembering that where light bulbs. And fluorescent lamps often scatter light beams in all directions. The light output of the LED is spread at approximately 180 degrees. Which gives a stronger perceived light with an LED versus a corresponding light bulb.
LED / HID look at Candela / Lumen. Guessing, high intensity LEDs are more light for every watt. And most bright overall.