On the brightness and LED number of LED flashlights
What do you mean, lumen and CREE are powerful LED (used in high-end lighting products), the so-called single core is in a LED stent, while packaging two or more chips to improve brightness. The finished product of the flashlight is, of course, the total luminous flux
See you have so many problems, want to DIY a qualified flashlight, afraid it is a bit difficult, I don't know what you are learning professional
There is a direct relationship between the brightness and the first reflector two + lens reflector cup determines the irradiation angle, now on the market of low-end products generally in line with the diameter of 5MM white light LED as the light source of the flashlight, the same as the 5MM white LED but there are different levels of brightness (HA ha, now prices determine brightness) 5MM white light single should have above 12000MCD, three to five LED to achieve the common lighting requirements.
