| NOTE 1: The maximum runs provided here were based on laboratory testing conditions. However, based on customer feedback we have received, the maximum runs we have provided here are approximately 20% shorter than what can actually be used out in the field. Again, this is solely from actual users such as yourself and we do NOT recommend or endorse any longer runs than what we have provided on this chart. |
| NOTE 2: When buying a 150 foot spool or a 300 foot spool, why can I only run 50 Feet or 80 Feet? Simple. This means that you will have to provide power via a transformer to each run by using either multiple transformers, or a single transformer. The main concern would be to avoid voltage drop. (click here for a definition of voltage drop) |
| NOTE 3: Reminder: We do NOT cut this tree lighting and do NOT offer anything smaller or larger than the 150 foot and 300 foot spools. |
What is Voltage Drop? As electrical energy passes along a wire, it loses a little "electrical pressure" or voltage the further that it travels, meaning your voltage output will decrease as the distance increases from the transformer. This is called Voltage Drop. Lamp life, light output, and color temperature are affected by voltage as it is measured at the fixture. The values for a given lamp are based on a voltage measured at the lamp of 12 volts (11.8 volts for some models). Operating the bulb at any other voltage will change those values. The factors that affect voltage drop are the load (wattage), the length of the wiring run, the voltage at the transformer, and the size of the landscape cable. Use the chart below to assist you in determining the maxiumum run from your transformer at a specific load (wattage), with a specific cable type, and at a specific voltage that you can use without experiencing any noticeable voltage drop. However, it is recommended to test the voltage at every light. The optimum range is 10.6 to 11.6 volts per fixture. We also highly recommend purchasing an inexpensive voltage tester. We have seen units sold from anywhere from $5 - $10. What is the Optimum Voltage for a landscape lighting system? Every volt is important on a low voltage system. The optimum voltage is debatable, but we prefer 11.6 volts. At this point you only lose a small percentage of light output but gain 200% in lamp life. If you think your project may require long runs or you are afraid experiencing voltage drop, then click here for our Multi Tap Transformers. |