The new version VDASH-EMU contains an improved RPM Led object with new properties to be able to create a standalone shift-lights WITHOUT USING Ledsmaster custom Shift-lights method or other settings.
Let start with a simple example, the Assetto Corsa Tatuus car with its 5 LEDs shift-lights, after checking rpm on track for each led we got this result:
LED 1 = 5800 RPM
LED 2 = 5900
LED 3 = 6000
LED 4 = 6100
LED 5 = 6200
So start by
creating the first RPM Led


Check the
RPM Range and then indicate the
RPM Range start 5800 end 6300 (beyond the rev limit) by editng the properties of the RPM Object
duplicate the object and change the start to 5900 and repeat the operation for all 5 leds


so you have RPM Range checked and the following properties:
RPM 5800 to 6300, color GREEN
RPM 5900 to 6300, color GREEN
RPM 6000 to 6300, color GREEN
RPM 6100 to 6300, color RED
RPM 6200 to 6300, color RED
that's it!

Your custom shift-lights is ready for the Tatuus car!
EDIT: for power/advanced user, if you pay attention to the RPM LED object properties you have also an EVAL field to programmatically lit up the LED.