Mini strut indicator lights work great with some factory softail struts and we also offer to machine your 2018-up softail struts to work with these lights. 
 
Amazingly small and super bright 3-1 (Run-Turn-Brake) rear indicator lights
Engineered in Germany with SMD-LED technology
Die-cast housing with 8 mm (M8) thread
Tinted glass with 0.4" (11 mm) diameter
Direct fit on most M8 Softails
Some applications may require the use of a load equalizer.
Older Sportsters, Dynas and Softails may require minor modifications to strut to fit.