I had seen post before about 6v headlight bulbs, But never gave them much thought. I still have 3 tractors that are 6v, as long they are still charging i'll keep them 6 volt. I would like to change out the 1133 bulbs & the 6v sealed beam bulbs to Led, What Led replacements would I need ? & where to get them? I am looking for brighter light & less current draw? Thanks Dave F.