For anyone new to landscaping lighting, you can think of voltage drop like a running hose. There is always more pressure at the beginning of the hose than at the end. 

Same thing with landscape lighting. The flow of electricity at the transformer is going to be a lot greater than it will be at the end of the wire run thus creating voltage drop. 

FX Luminaire provides a great free tool to help you calculate voltage drop that you can find here. 

Check out this short video from Midwest Regional Director of Sales & Design Scott Romaker on ways you can avoid voltage drop on your next project. 


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