A couple of questions... First, made my own led system, consisting of 2 2600mcd/3.7V(4.5max)/20mA LED's. wired them in series to create 7.4V... with a variable Voltage AC adapter set at 6V. I have no resistors in my setup and it runs fine...Ok, do i need resistors if my system is running fine without them? and can i run my set up at 7.5V without hurting the fish psychologically? Wondering if it was too bright...I also sanded down the tip of the LED's to create more of a glow instead of a burst of light. Thanks in advance.
John
John