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Old 10-29-2011, 03:59 PM   #1
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Low Voltage Lighting Transformer


I'm doing a low voltage lighting project for the pathway outside. I have no outdoor outlets at all, and the closest and available outlet is inside a bedroom on the opposite side of the wall.

I need a transformer for the lights. I don't need a timer with it, as it will only be turned on when needed by a switch. All the ones Ive seen have big bulky timer ones. I need a small one that will plug into an outlet. About the size of a wall wart that will supply 12 volt power to about 10 pathway lights and 2 spotlights. I will get 2 if I need to.

Also, even though its just 12 volts, should I install a GFCI outlet for it? Or at least one of those plug in portable GFCI's because other things are plugged into the outlet. (Laptop, TV, and a lamp)

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Old 10-29-2011, 04:22 PM   #2
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Low Voltage Lighting Transformer


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Originally Posted by seansy59 View Post
I'm doing a low voltage lighting project for the pathway outside. I have no outdoor outlets at all, and the closest and available outlet is inside a bedroom on the opposite side of the wall.

I need a transformer for the lights. I don't need a timer with it, as it will only be turned on when needed by a switch. All the ones Ive seen have big bulky timer ones. I need a small one that will plug into an outlet. About the size of a wall wart that will supply 12 volt power to about 10 pathway lights and 2 spotlights. I will get 2 if I need to.

Also, even though its just 12 volts, should I install a GFCI outlet for it? Or at least one of those plug in portable GFCI's because other things are plugged into the outlet. (Laptop, TV, and a lamp)

You need to size the transformer to provide at least 110% of the wattage of your lamps (if the total wattage of your lamps if 90 watts, then you need a transformer that outputs about 100 watts). A small wall brick will probably not provide you with enough output.

I would install a GFCI on the outside of the house in a weatherproof box with an in-use cover (tapping from the interior bedroom receptacle you mentioned), and then plug your transformer into that.

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Old 10-29-2011, 05:59 PM   #3
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Low Voltage Lighting Transformer


You are not going to get away with a wall wart. You say 12 LV fixtures, if you install 50 watt Halogen lamps you are talking 600 watts. That is 50 amps at 12VDC.

You need a minimum 600 watt LV landscape transformer and 3 individual runs of #12 LV underground wire.

Have you considered solar?



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Old 10-30-2011, 01:44 AM   #4
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Low Voltage Lighting Transformer


Please provide more info on the current draw
of the lights you wish to use.
Unless they are LED lights I doubt that
a small plug pack will provide enough power.
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