Aquarium LED Lights, Controllers, PWM; What is Best

[Gregg]

I have revised my post about the use of different methods of dimming & controlling LED fixtures.

This is an important subject missed by so many, especially large, poorly moderated forums such as Reef Central or PNWMAS

Here is a "tease" from this post:

One potential negative of PWM is some switching “noise” can be produced, but this is easily filtered with an inductor and a capacitor, the result is any noise is very minimal.
More importantly this very minor potential negative is often exploited by less than honest Internet articles or especially forums as a way to distract from the fact that the use of linear or analog dimming employed by the vast majority of aquarium fixtures is vastly inferior, wasting a considerably amount of PUR spectrum and light energy as heat!!!!
Any almost inaudible noise from LEDs controlled via PWM is going to pale in comparison to the fan noise due to the heat LEDs create by using “reduction of current” dimming which produces more excess heat.

http://aquariumopinions.com/2013/07/07/aquarium-led-lights-controllers-what-is-best/

G