One, first said the difference and brightness, we are always asking certain businesses flashlight light not bright ah what is Q2 and so on, let more people ask scratching their heads, XXX business and XXX business that several of the Q5 who is more bright, coma, simply can not answer, so to explain.
The first LED early 5MM and domestic straw hat, but in the flashlight jar had eliminated, is now the South Korean Seoul and then a few do, and do more is a brand of electric lamp.
The N P Q R brand to distinguish the brightness grade, which is grade in each subdivision, that is to say N4–P3 P4 Q2 Q3 —Q5 R2–, and N have been eliminated early, just out of R series is still very rare, now in the jar to do business this minimum is roughly P4, as brightness theory of P4 and Q2 are 7LM, Q4 and Q5 in turn also is 7LM, each grade is 7LM, if this value is made in the current 300MA under it, and the gap of 7LM is difficult to see with the naked eye, no difference between dozens of lumens are almost difficult to see, perhaps this is why did Q2 and Q5 do more and Q3 Q4 were not done because of it, the brightness is too close to distinguish.
So if a few businessmen are Q5 to do so is the same as the flashlight, brightness, and the only difference is the circuit, to see what the circuits, current settings in a large, do not want to set more certainly more bright (as well as a problem of efficiency, but the effect is not affected, the brightness of life) is similar to computer overclocking, exceed the rated range, the brightness and life is inversely proportional to the brightness, the brighter the life is short, so we asked the flashlight light not bright as set in the current ask much, and we need to how much energy in the study, set their willingness, businesses can give you set. Of course, to the light it will have to abandon life!
There is a LED lamp in more than 350MA current, brightness enhancement ability is weak, that is high but not great current brightness before 350MA increase so high, which is why we have 300MA and 1000MA current is so much brightness but not so great disparity in the imagination, low efficiency, manufacturers must also understand, so that the 300-350MA is set to the rated current. As for the choice of circuit which jar is the most used N*7135, small gold circuit, East into the circuit, show circuit Qi, some suitable for high power LED power, some suitable for smaller LED, as to how you look at the search efficiency of the circuit compared to see which is more suitable to choose their own LED, which is a constant current the best efficiency, which fit… Of course. In fact the efficiency is slightly different, but the difference is not much, but some are almost a constant current is boost, some pressure, according to LED VF LED for some different values of some suitable for buck boost, but at the same current (LED current) can be said to brightness are not just life, efficiency (battery terminal and LED current differential loss).