Your question got me interested so I searched the Internet. This revealed that Charger beer was launched in the early 1970s by brothers Arturo and Orlando Matus.The beer competed for a while with Belikin until an acute shortage of bottles (and a high cost of replacing them) 'forced' the brothers out of business.
According to the Belikin website (http://www.belikin.com/belikin_history.html
) Lighthouse was introduced much,much later. It does not suggest a name change took place ie Charger to Lighthouse.http://www.abelizehomeforus.com