365nm is for banking cheque and currency checking purpose, and 395nm is for Neon color Identification and 405nm is for curing purpose. Please select as per your requirement 
LED Size :- 2835
Technical Parameters:
Model Type: RDR 
Emitted Color : Ultra Violet 365nm/395nm/405nm
DC Forward Voltage (VF):  12v DC operated
Power: 6W (0.5w x 12 led)
Maximum junction temperature: 120°C
Dimensions :- 16.5cm x 2.8cm x 0.5cm
Heat sink or base plate Required.
 
Package Include: 1pc of 6w 365nm/395nm/405nm 0.5Wx12 UV LEDs with PCB 12v DC