Bike light amps

Chief31

Newly Enlightened
Joined
Nov 25, 2012
Messages
17
I can dismantle the light but how do I test how many amps the driver is running the leds at. Fluxient 3 XML U2 3000 lumens.
 

AnAppleSnail

Flashlight Enthusiast
Joined
Aug 21, 2009
Messages
4,200
Location
South Hill, VA
Well, you'll have to open the circuit. 'Tailcap' current is easy to measure since it doesn't require disassembly. Otherwise you'll have to pop a wire between the driver and LED to measure it.
 

ianfield

Newly Enlightened
Joined
Jan 7, 2012
Messages
97
Well, you'll have to open the circuit. 'Tailcap' current is easy to measure since it doesn't require disassembly. Otherwise you'll have to pop a wire between the driver and LED to measure it.

Measuring at the tailcap may give different current than is flowing through the LED - for example a 2-cell lamp with white LED will have a boost converter to generate enough voltage for the LED Vf, the boost in voltage comes at the cost of higher battery current.
 
Top