U.S./Canadian Transformers Powers up to 130 micro bulbs or 55 1.5V GOR bulbs These transformers have straight blade pins and are designed primarily for the U.S., Canada, and Mexico, as well as certain other countries, such as Japan. Cir-Kit plug-in transformers provide a safe and convenient power source for any dollhouse or miniature room. All Cir-Kit Concepts' transformers are designed to plug directly into a powered outlet, thus eliminating the need of building a special transformer enclosure within the dollhouse. Cir-Kit DC output transformers are a marked improvement over our prior AC models. They provide a steady 12 volt output, whereas the AC style had a higher output voltage with light loads and a lower voltage at heavy loads. The higher voltage was hard on bulbs and the lower voltage resulted in dimmer lights. The DC transformers are completely solid state allowing a constant 12 volts at all load levels.