WHAT IS OUR RECOMMENDATION OF TRANSFORMER SIZE VERSUS NUMBER OF LIGHTS?

The max draw on the 3LED (high-output) is 11 watts. The transformer needs to be a UL listed 12VAC outdoor pool/spa rated. Intermatic 100 or 300 watt recommended. For example, using one 11 watt light and a 300 watt transformer would not be any brighter than one 11 watt light with a 100 watt transformer.