Join Date: Jun 2017
Location: Denver CO
Model: GL1500 Aspencade 1980 GL1100 STD Vetter
That voltage is a little high, and the reduced draw from the LED is putting more load on the factory shunt regulator. Added heat in the regulator could cause failure and 15v is a little high for the battery too.
LEDs are nice to have, I'd look at upgrading the rectifier and regulator (separate units on a GL1000 as I recall) to one of the new MOSFET Series type Rec/Reg combo units out there now.
1972 CL-350 (1980-1988) sold
1978 Suzuki GS-550 (1985-2005) sold
1977 GL1000 (2002-2006) sold
1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)