Electric is related to Engineer. Engineer is related to Mechanical. 
Sunlight can be Bright. Bright is a synonym of Favorable. Favorable is the opposite of Bad. Bad is a different concept from Perfect. 
Electric <--RelatedTo--> Engineer <--RelatedTo--> Mechanical 
Sunlight --HasProperty--> Bright <--Synonym--> Favorable <--Antonym--> Bad <--DistinctFrom--> Perfect 