Our display is relatively primitive - off the shelf (mostly BigW) strings run around garden beds, roof etc - I keep coming up with problem of having too many 240 to 30v transformers to run off a single power board (240v type). I have seen power boards piggybacking power boards but don't want to go there. Has anyone used a single low voltage power supply to power maybe 10-12 strings of say 600 leds. Also could that same power supply be used to increase the total number of leds in a string (bigw generally 600 leds) perhaps up to 2400. Any advice appreciated.