Dayoyo try adding
import org.openhab.core.library.types.HSBType
into your script - I got past this and now get
2016-07-04 23:35:50.954 [ERROR] [o.o.c.s.ScriptExecutionThread ] - Error during the execution of rule ‘RGBLight’: org.eclipse.xtext.util.PolymorphicDispatcher$NoSuchMethodException: Couldn’t find method ''assignValue’’ for objects [JvmVoid: (eProxyURI: lifx.rules#xtextLink::0.2.0.2.0.0::0::/1), hsbValue , 66.000000,80.567123,1.666665, org.eclipse.xtext.xbase.interpreter.impl.DefaultEvaluationContext@7862adec, org.eclipse.xtext.util.CancelIndicator$1@7c181b20]
havet worked out why
Do I need some more imports?