Gransee
Flashlight Enthusiast
Farkle Cosmetic Update:
The cosmetic issue we are calling "farkle" (Foreign object/Sparkle) is a small crystal like pattern sometimes seen around the center of the LED Lens on a Luxeon Star flashlight.
This appears in luxeon star flashlights from several different manufacturers. The above picture was taken by 'Klaus' of the CPF.
First, I want to say that this is strictly a cosmetic issue. It does not affect the beam of the flashlight and it does not affect the durability or lifespan of the LED.
Farkle is produced when an adhesive residue left over from LED manufacture is deposited on the underside of the NX05 optic. Often just a light brushing of the LED and optic is all that is required to produce the farkle image in the optic. The optic magnifies any small object placed on the rear of the optic so that the farkle appears several times actual size.
For proper light transmission, the NX05 optic must be placed either very close or flush with the LED housing. Therefore, farkle is a common result.
Variations in the amount of farkle is common because of irregularities in the amount of adhesive residue. The adhesive has the consistency of uncured silicone adhesive.
Cleaning of the LED prior to insertion does reduce the instance of farkle to some degree but does not eliminate it.
Arc Flashlight has been testing several different types of cosmetic enhancements for our line of Luxeon Star ("LS") flashlights.
Peter Gransee
The cosmetic issue we are calling "farkle" (Foreign object/Sparkle) is a small crystal like pattern sometimes seen around the center of the LED Lens on a Luxeon Star flashlight.
This appears in luxeon star flashlights from several different manufacturers. The above picture was taken by 'Klaus' of the CPF.
First, I want to say that this is strictly a cosmetic issue. It does not affect the beam of the flashlight and it does not affect the durability or lifespan of the LED.
Farkle is produced when an adhesive residue left over from LED manufacture is deposited on the underside of the NX05 optic. Often just a light brushing of the LED and optic is all that is required to produce the farkle image in the optic. The optic magnifies any small object placed on the rear of the optic so that the farkle appears several times actual size.
For proper light transmission, the NX05 optic must be placed either very close or flush with the LED housing. Therefore, farkle is a common result.
Variations in the amount of farkle is common because of irregularities in the amount of adhesive residue. The adhesive has the consistency of uncured silicone adhesive.
Cleaning of the LED prior to insertion does reduce the instance of farkle to some degree but does not eliminate it.
Arc Flashlight has been testing several different types of cosmetic enhancements for our line of Luxeon Star ("LS") flashlights.
Peter Gransee