ECN Forum Forums General Topics of the Trade General Discussion Area 100 W HPS fixture issue

Merlin:
Think about the Vd at the house when the ac starts, then use that voltage for a 'source' to calc the additional Vd in the 425' to the barn.

By any chance, is the ballast a multi-volt?....You could use the 208 volt tap if it is. That may be a quick fix.