Calculate the total wattage of all lighting fixtures that will be hooked up to your transformer. The total wattage will be the minimum required output of the transformer.
When sizing a transformer for an LED installation, use the wattage consumed by each lamp, not the wattage output or brightness equivalent.
The industry recommends utilizing 80% of your transformer’s capacity for optimal system life.
Example: a 60 watt transformer would be ideal for the lighting installation below.