Good to have each lit differently (7)
I believe the answer is:
ethical
'good' is the definition.
(thesaurus)
'each lit differently' is the wordplay.
'differently' is an anagram indicator.
'each'+'lit'='eachlit'
'eachlit' is an anagram of 'ETHICAL'.
'to have' is the link.
(Other definitions for ethical that I've seen before include "Morally acceptable" , "lt's available on prescription only" , "Approved moral behaviour" , "Conforming to accepted standards of behaviour" , "Morally proper" .)