I just bought a new outdoor LED Flood lights which i plan to use on a field. However, when connected to a power source, the lights keep flashing and has a humming noise. The flood lights are 12vdc @ 13A and In order to power the flood lights, i bought an LED magnetic driver (200watts, 12v). what can i do to prevent the flashing and be able to utilize the flood lights?

  • What are the specs of the transformer? Flashing and buzzing can be indicative of an impedance matching issue.
    – Comintern
    Sep 21, 2014 at 5:09
  • input: 120VAC 60Hz
    – ike
    Sep 22, 2014 at 2:19
  • @ Comintern output: 12VDC
    – ike
    Sep 22, 2014 at 2:21
  • P/N M200L 12DC 200W MAX
    – ike
    Sep 22, 2014 at 2:22

1 Answer 1


If it's a good quality power supply, the pulsing means the power supply is possibly overloaded. It's the power supply's, method of telling you that, which is called "hiccuping." A load of 156W may be too close to 200W. You should allow for load + 20% when choosing a power supply.

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