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+# Light Emitting Diodes (LEDs)
+
+A light-emitting diode (LED) is a semiconductor device that emits light when an electric current flows through it. 
+When current passes through an LED, the electrons recombine with holes emitting light in the process.
+Just like diode, the process to model blue led is also the same, it is to be noted here
+that the forward voltage of the LEDs are higher than the normal diode.
+# Red LED
+```
+.MODEL eSim_RedLED D( Is=1e-10 Rs=0.1 N=4.09 tt=4.0e-6 Cjo=3e-12 M=0.5 Vj=0.7
+Bv=5 Ibv=10e-6 Fc=0.5 Isr=0.0 Nr=2.0 Kf=0.0 Af=1.0 Ffe=1.0 Xti=3.0 Eg=1.11
+Tbv=0.0 Trs=0.0 )
+```
+**NOTE: The name of the above LED is set as eSim_Red_LED the same name of the LED must be given to the subcircuit while creating the symbol for LED. While the D is the designator for the diode.**
+
+# Blue LED
+
+```
+.MODEL eSim_BlueLED D( Is=1e-10 Rs=0.1 N=6.68 tt=4e-6 Cjo=3e-12 M=0.5 Vj=0.7 Bv=5
+Ibv=10e-6 Fc=0.5 Cp=0.0e-12 Isr=0.0 Nr=2.0 Temp=26.85 Kf=0.0 Af=1.0 Ffe=1.0
+Xti=3.0 Eg=1.11 Tbv=0.0 Trs=0.0 Ttt1=0.0 Ttt2=0.0 Tm1=0.0 Tm2=0.0 Tnom=26.85
+Area=1.0 )
+```