LED Flashlight,LED Reading Lamp, Hand Light,Emergency Light,Mosquito Killer Bat, Headlight

Consultation version novice emergence of a new post every day topics will include "Please recommend a flashlight," such key words, and these questions in more than 50% of people can say that in the end is simply unclear about what you want a barrel. And everyone seems Replies seller for such little help, but some even at a loss. Suddenly the idea a little bit today, so wrote the following article. In order to avoid 'lengthy' lead to impatient readers read to simplify the processing, I hope to give novices some useful guidance.


Chapter I: the brand or the cottage?

Brand: quality and reliability in the more secure, but it also means much higher prices.
Cottage: there is no quality assurance at all, more a matter of luck, there must be a lot of irrational, but wins in very cheap.
"What you pay for" is the eternal truth, low price means low cost, it is far from alone the cost of raw materials, including design, production and processing and assembly, inspection test, packaging, accessories and after-sales service and so on. The barrel of a mass sell a hundred never be with a ratio of one to two thousand of the SUREFIRE.

The first concern for many people is a life issue, however, with the actual life span theory of life there are many unstable factors:
1) light the life of 50,000 hours by CREE for the theory of life, this is the theory of the 350mA current life, we push the current to 1A, together with differences in different Shaft by heat, the LED's do not know the actual number of remaining life;
2) the life of the circuit, I do not know the existence of their own electronic components, to what extent the problem of aging, but if the circuit is designed to be unreasonable, the chances of major problems. Should be said that the more simple circuit, the less chance of problems; practical time, frequency, cooling circuit, the quality of electronic components and circuits, etc. These factors are closely related to the life (please do your homework.)
3) Flashlight structure also affects the rationality of the life of torch, for example, thermal cooling, sealing, parts (such as switches) quality and so on.

Big brand design from the beginning to the production, assembly places, to the late quality, absolutely do better than the cottage, the probability of defects is low. For example SUREFIRE, its biggest selling point is reliability, 'quality control' compared to other brands should be more perfect. For the said cottage tube, its main purpose is to flicker you buy, so a common trick is to try to push their current higher brightness, but the applicability of life and stability of these problems are not their concern; However, to obtain maximize profits, the cost to a minimum of natural, so difficult to lower production and processing, using cheaper materials, it naturally will not have sophisticated design, the structure is too simple and lack of rationality, material difference Daozhitongshen poor strength and thermal conductivity . Not to expect any quality control and quality assurance at all.

Of course, money is a key issue, as an aging Guangzhou: "spirit shook hard on you Qionga top!"


Chapter II: value and use value

Something of value and a user fall into the hands of what value is the use of two concepts, give an example: If you just bought to shoot with automatic "XX a visit, yeah ~ like the photo, then , a thousand digital fool machine should be said that more than sufficient, there is no need to buy professional-grade SLR (or even entry-level SLR). Similarly, if you buy a flashlight just to simple, practical, usually look in the road, or emergency when the photo look, the quality flashlight will not bring the words of the difference between life and death, can not consider SUREFIRE like. Of course if you buy SUREFIRE there is absolutely no one will object, but it is still necessary and sufficient problem (high school math in the 'necessary and sufficient conditions', remember?)



Chaper III: you buy a tube of motivation?

In order to use needs?
Work or life due to the needs of long-term or frequent use of lighting instruments, performance and reliability should be considered first, such as volume, concentrating effect, life, gear set, the choice of battery and so on.
Often used for a long time: do not be too paranoid of brightness, enough on the line. Optional larger capacity battery 18650 lithium battery (if necessary with battery), the circuit voltage of 63,000 choose to automatically lift the circuit is more suitable because they can ensure the constant current output, battery-use efficiency is high, but remember with spare batteries, because it is difficult to judge from the brightness when the battery is dead.
Often used, but each time is not long: you can choose a compact portable small cylinder, single file or dimming (by the use of get used to be), the circuit can choose to step-down constant current circuit (eg 7135, etc.) Because the battery can be judged by how much light power to decide whether to charge or replace the battery without having to carry spare batteries.
Outdoor patrol, search and other: You can choose larger and larger cups of light reflectivity means that the higher the rate and extent of further irradiation distance (of course this is related to the optical design problems, specific conditions), select the capacity of the battery larger section 18650 or other larger capacity lithium battery, larger and strong Flashlight, if necessary, when the short stick as a "temporary weapon" practical. Do not superstitious the first attack, because they are mainly decorative, almost no functional use at all. Strobe is the same, only from a warning, no help for uniformed opponents!
Jiju as a single lamp with: general Shecheng not too far away, there are 30 to 50 meters to, but the brightness is higher, and the irradiation area to be large (a light one large), life longer (可 using multilevel 18650 or other large-capacity battery), usually do not require dimming, the circuit can be a reliable single file, like 63,000 auto-down cross-flow circuit is a good choice, but remember with spare batteries. Because the bike can be 'air', so in order to improve the brightness of the current up to 1A can, of course, provided that the LED Flashlight heat through. The current MC-E, P7, SST and the like is a good choice.

In order to show off, show bright?
One can not deny is that most people buy a barrel of this ........
Anyway, bright and eye-catching of all is to, you can choose a larger circuit output current, battery size and what does not matter, without violating the laws of physics under the premise of selecting the most light illuminate the farthest. Selected according to their aesthetic appearance of the most cool of. Circuits does not matter what, a few dollars to tens of dollars 7135 63,000 pick their own, anyway, you have your burning, burning cheap are cheap. Some people think that the more expensive the greater the face of it does not matter.

Greedy fun, easy?
In modern society, the real opportunity to use the flashlight is not much, but for convenience or fun, or is in the pursuit of a more electric childhood rival left the plot, then the fact is mainly to buy according to your favorite a, for example, a small straight fact AA performance are similar, then choose your favorite shape, as many businesses have different circuit alternative circuit.


Chapter IV: identify their own needs
Once you buy a tube of motivation, choice and will have a certain direction. But faced with many choices, it is inevitable to spend too confusing.
Do not think "a cone take the world": There is no perfect thing, especially in the context of limited resources, then choose the best to meet the requirements. Some novice request is "both long-range but also to light a large pan," "it is necessary to highlight the small size but also life itself is contradictory "....... long, light it so a total of point of light, you put more focus light in one direction with the radio, concentrating on the better, and pan around the light exposure to the relatively weaker; you want to illuminate a large area to more light must be evenly distribution area in a certain range, then can be gathered in a little light on the relatively small, and that the condenser is bound to relatively weak point. The two can not have both, you will need the election. No pig bones can cut both cut fruit knife.
Be assertive, do not parrot. People who bought with their own, others will not be more than you know how you want to use, we Replies different preferences due to every man was feeling the difference, or will give different recommendations, there is a reason for A, B also truth B, C is also true to say ....... but the key is your own choice.


Chapter V: Knowledge is the key
The importance of doing homework: can not consequently do not understand their own light while sitting on the side of fantasy such as we give you the answer, but more to understand the relevant knowledge, such as understanding the type of LED and basic performance parameters of the LED The basic working principle of a flashlight and common configuration and performance of a preliminary understanding, to build on their existing knowledge of science to understand, can not be imagined or hearsay.
Know these, and know why: For many people say good / bad things can not just listening to calculation, to know why the good, why not, good was good, not good not good where it is. This will avoid blindly follow the trend, buying back only to find no suitable thing to happen. For example, some "flying" in terms such as: Q5WC, R51B, Q35C, 63000, 18650 small straight, smooth metal cup, with protection of the battery, 248 lumens, 5 files dimming ....... Taobao almost every cheese introduction to some of these terms will appear, and what they really represent? If even these did not get to know, just parroting the words, been fooled opportunity is still very high.
So, use the search function top right forum, search keywords and more looking through old posts, which will not only find the answer you want, but also learn a lot of relevant knowledge. Mastered the knowledge that all problems and solutions will greet edge!