LED Flashlight Luminous body flashlight
LED flashlight basics
The basic principle is the current from the battery out, and then reach the circuit, through the circuit to adjust the voltage and current, and then output to the light-emitting device, Body, lighting lighting.
Luminous body flash with light: LED flashlight, halogen lamp, ordinary light bulb and xenon bulb (sub-tungsten wire filled with xenon and just filled with xenon HID) and so on. As for me here to explain the brightness of each LED unit unified lumen (Lumens) marked, that is usually said that the luminous flux.
1, the most popular is the most recent LED, the Chinese full name is "light-emitting diodes", low-power LED are generally used in the 1AA or 3AA, I do not say that the power is too small, home can, But the outdoor more than the difference, the main talk about the use of outdoor high-power 3W it, the main representative is currently the most popular is the United States CREE LED, long life, according to manufacturers up to 100,000 hours of data. (1) P3,350mA brightness 73.9-80.6Lumens, 700mA brightness 119.7-130.6Lumens (2) P4,350mA brightness 80.6-87.4Lumens, 700mA brightness 130.6-141.6Lumens (3) Q2,350mA brightness 87.4-93.9Lumens, 700mA Brightness 141.6-152.1Lumens (4) Q3,350mA Brightness 93.9-100.4Lumens, 700mA Brightness 152.1-162.6Lumens (5) Q4,350mA Brightness 100.4-107Lumens, maximum current 1000mA (6) Q5,350mA Brightness 107-114Lumens, the maximum current of 1000mA (up to 220-250lm) Although many models, the most commonly used is P4, Q2 and Q5, which is now the most popular because Q5 because of high efficiency, brightness, the current can be 1A, Brightness up to 250 lumens. LED color temperature: each type of LED, but also according to the different color temperature into different types such as Q5 Q5WB, Q5WC, Q2 Q2WB, Q2WC, Q25A and so on. Basic commonly used color temperature from 5000-10000K, according to K value points WJ, WD, WC, WB, WA, etc., popular talk about the lower the color temperature is more yellow, the higher the more white. Here I only more popular on the market several colors for a simple description: (1) the most popular is the color temperature of WC, 6700K color temperature, white light is suitable for most occasions, the glare of the brightness is also very suitable for bright show. (2) Q5WB, 8000K color temperature, white light slightly blue, because it looks brighter than WC (because WC compared to slightly under the yellow), the actual use of the luminometer to detect the brightness is the same, by most manufacturers The use of mass production flashlight, we buy most of the domestic manufacturers are high-power flashlight WB color temperature. (3) Q25A, color temperature in the 4000K-4500K, are warm white series, light color yellow, because the yellow penetration, more suitable for outdoor use. Speaking of LED here also talk about the ultra-high power LED, and just said that the 3W is the highest to 250 lumens, and now South Korea SSCP7LED also used in a large number of domestic LED flashlight, the current 2.8A, the highest Up to 900 lumens, the current domestic is more mature is WF-900, the brightness is indeed high, super dazzling, is characterized by astigmatism is good, but the long-range is not very strong, after all, the depth of the lamp cup has limited the characteristics of LED
1. The meaning of limit parameters
(1) Allowable power consumption Pm: Allows the maximum value of the product to be supplied to both the forward DC voltage at both ends of the LED and the current flowing through it. Beyond this value, LED fever, damage.
(2) Maximum forward DC current IFm: Allows the maximum positive DC current to be added. Exceeding this value can damage the diode. The
(3) Maximum reverse voltage VRm: Maximum permissible reverse voltage applied. Beyond this value, the light emitting diode may be damaged by breakdown. ?
(4) working environment topm: light-emitting diodes can work in the ambient temperature range. Below or above this temperature range, the light emitting diode will not work properly and the efficiency will be greatly reduced.