We compare Mag-Lite with two no-name LED Flashlight: Saving energy ultimately depends on these devices along with the convenience.
Flashlights are very gladly offered by PiercingFlashlights – nothing eats even the most expensive batteries as soon as empty as a flashlight bulb.
If possible, cheap, bad switch constructions assist, the most popular are any dubious rotary or slide switch, the “natural” by itself turn on, at least a little, and so completely unnoticed empty suck the battery.
This then leads to the flashlight during a power failure, when you need them, prompt no more juice has – and with any luck the deeply discharged battery has leaked and has even dirty the inside of the flashlight. The good news (for the battery manufacturer):
If you are not very thorough dressing, the caustic residues will lead to leakage and drain the new batteries also.
The second problem: bulbs draw a lot of power and can be quickly in brightness to when the batteries no longer play. Therefore, they are usually designed for overvoltage: A flashlight that works with 4.5V, three battery cells, usually contains no bulb for 4.5 V operating voltage, but one for 3.8 V, 3.5 V or even 3, 2 V.
As long as the battery is very fresh, the bulb so here shine with surge almost bluish – and therefore not old, if you particularly good batteries used instead of the simple standard zinc-carbon cells.
LEDs are much more efficient than incandescent bulbs, so they operate with the correct wiring. Cheap LED flashlights use three rather small batteries and feed this directly a handful of white LED. the current is limited in this way, but this is actually the wrong way to provide LEDs: You have to be operated with a defined power, not directly from batteries. The result is similar to the flashlight bulb: not light the fact 100,000 hours holding LEDs are quickly broken and not quite full batteries.
The better use flashlights instead control electronics, thus coming out with two for larger batteries, which is much cheaper to run.
The other difference: There are LED flashlights that are similar to LED lamps for the apartment are composed of many small LEDs, and those that use a high-power LED. When flashlight that night lights far, only the latter construction is suitable, the former is only good for reading under the covers or lights in the tent while camping.
Now that there are LED flashlights with up to 5-watt LEDs are – what 20 Watt incandescent correspond and thus already more than a car headlight as a flashlight – they can keep in luminance even with the strongest Mag-Lites. Only the focus is in LED flashlights usually not adjustable.
However, there are also some Mag-Lites now LED versions or LED retrofit kits. This we could not test, however, because the German importer Hintz emails did not respond, answered no questions, and on the phone just to renewed email asked to the then not to answer again.
As seen in the picture, the 3W and 5W LED flashlights that are to have at Pearl for about 20 or 30 euros, certainly compete with the larger lot Mag-Lite 3D – both in luminosity as well ( of course not be seen in the photo, but tried at night) in terms of focus. Only the LED flashlight with 12 LEDs for just under 10 euros is not to be recommended: it has the disadvantages mentioned, in particular the unreliable rotary-shake switch, and therefore had fully discharged their batteries in time for photo …