The Infrared Led blue light is normaly use for Free air transmission system, for infrared remote control units with hight power requirement, for smoke detector and for infrared applied system. 

Descriptions : 

EVERLIGHT’S Infrared Emitting Diode(IR333-A) is a high intensity diode, molded in a blue transparent plastic package. The device is spectrally matched with phototransistor, photodiode and infrared receiver module.

Features :

• High reliability 
• High radiant intensity 
• Peak wavelength = 940 nm 
• 2.54mm Lead spacing 
• Low forward voltage : 1.4V / 100mA
• Pb free 
• The product itself will remain within RoHS compliant version. 
• Color: Light blue
• Pack of 10