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You are here: Home > Lighting School™ > Halogen/Incandescent > Choose a Transformer
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How to Choose the Right Transformer

  • Choose your fixtures according to your plan
  • Add up the individual bulb wattages of all the fixtures in your system.
  • Choose a Transformer that is large enough to provide the needed total wattage for your system. The load (total watts needed for your fixtures) should be within 50 to 80 percent of the rated capacity of the transformer. For example use a 300-watt transformer for 150 to 240 watt loads. This will allow at least 20 percent more capacity in case you add lights later. A transformer that is too large for the load may overdrive the lamps which will shorten their life spans.

Example:


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