This calculator applies only to low voltage (12 or 24VDC) recessed lights. If you're chooseing 120VAC lights, you can ignore this section as you don't need a power supply. When using low voltage LED recessed lights, a power supply (sometimes called a driver or transformer) is used to provide the LED lights with the low voltage power that they need to run. The power supply connects to standard house current (120VAC) and steps this current down to 12 or 24VDC. In automotive or marine applications, this power can be supplied from a 12vdc or 24vdc battery. The most popular low-voltage choice used by residential and commercial customers is 24VDC, since it is still a safe low voltage and yet it provides more protection against voltage drop, and consumes less current. If you have any questions about sizing your power supply, please don't hesitate to chat live with an LED expert.
Please make your selections above and press calculate.
Simply round *up* to the nearest power supply size. Remember that it never hurts to go larger with your power supply, but your lights will not operate properly if your power supply is too small. If needed, you can also use multiple power suppliesto meet your consumption requirement. The minimum power supply size automatically adds 20% to your total consumption to account for voltage drop and in-rush current at startup, also, most inspectors will consider the power supply a current generating device and they won't let you load it over 80% continuous, so the 20% added solves for this as well.
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