Reply To: Lighting Source for MOCs Home › Forums › All Things LEGO! › Lighting Source for MOCs › Reply To: Lighting Source for MOCs October 7, 2013 at 9:18 am #3576 LauraParticipant Greg – They are 4.5 volt. I do not know how they could be connected to a Lego 9v transformer. You might be able to run two strings in series off a 9v Transformer.
