LED Down lights

 B: GAP yellow-green chip, the emission wavelength does not have a large error , but because the  LED Lighting china human eye color sensitivity of this band is very simple detect yellowish , greenish. Because the wavelength is epitaxial wafers data resolution , the smaller the area , showing the concept of color error is smaller , so the M / T operations in the vicinity selection method .

Ceiling Light

C: GAP red light emitting chip and some orange color is a partial , because its light emission mechanism is a direct leap . Affected by the impurity concentration , the current density is increased , prone to impurity level offset and full glow , light is beginning to orange yellow.

4 brake fluid effects ;

LED Down lights 

A: a light emitting diode under the normal voltage can not be turned on, when the voltage level to a certain height , sudden changes in current occurs .

LED Downlights

B: brake fluid appearance reason is the occurrence of luminous information presented grow epitaxial wafers reverse sandwich , there is the appearance of the LED at IF = 20MA forward voltage drop test when there hiding resistance, in the use of the process is out of the polar voltage not large , reflected not lit, the instrument can test information from the transistor curve tracers test can also be through the small current iF = 10UA to discover the forward voltage drop , low current was significantly lower forward voltage drop is too large , then the the questions can be formed .