1. Choose your fixtures, in any combination, according to your plan.

2. Add up the individual bulb wattage's of all the fixtures in your system.

3. Choose a Transformer Power Pack that is large enough for your system. Transformers are available in the following sizes:  45, 100, 120, 150, 200, 250, 300, 500, 600, 750, 900, 100, 1200, 1,500, and 2,000 watts.

Example:

NOTE: When necessary, divide large systems into 2 or more smaller systems using additional Power Packs. In which case, total only the bulb wattages for each fixture within each smaller systems to determine the correct size Power Pack needed for each smaller system.