I just finished wiring an LED array with several series of 5 3-watt LEDs (~2.3 volt fV, 13.8 V power supply, 350 mA max current) with a 4 ohm, 1-watt ceramic resistor wired to each series to limit current.

I just realized these resistors may be limiting the brightness of my LEDs. If the resistors are rated at 1 watt, and the LEDs are 3 watts, will they limit the brightness of my array?

Also:

I have a pyramid PS52KX 52 amp power supply that has an input of 115 volts 60 hz and 1000 watts. Its output is 12-15 volts and 40 amp constant/52 amp surge.

I have 540 3 watt LEDs in my array at the moment. 540 x 3 = 1620 watts. Do I need a power supply with more watts to get the most output from my LEDs?

The power supply, at the moment, "flickers" and will put out close to 30 amps then drop down to 20 amps or so, and this happens on and off while the array is lit up. Any idea what could be causing this behavior?

Thank you.