I've noticed that Volt recommends a magnetic transformer? I'm curious to understand this? I'm looking at Unique lights that appear to have the same MR16 LED fixtures and they do not specify the type of transformer? I already own a 200W digital transformer and would prefer to use this with the Volt Salty Dog and Deck Light MR16 system? I'll likely buy the Unique lights if I am required to purchase a new transformer. I'm not requesting a lesson on magnetic v electric, I just need clarification on why Volt is specifying magnetic?