I want to make it the most basic and most efficient. I plan to grow 1 plant, autoflowering under LED (these are freebies my friend got from seed shop named auto diesel x auto AK feminized) also gonna go with DWC setup. So most basic design, crapton of small low power LEDs and simple efficient circuit resulting with smoothened 230V DC and LEDs in long chains. No fancy billions of colors, just red and blue. What I wondered is: What wattage should I aim at? (looking at upper limit) Should I use resistors? or just lengthen LED chain (highest efficiency possible is what interests me the LED is most efficient within 10-20mA range, however I have no measuring equipment, so no idea how LED reacts on undervoltage) Should I add an option to modify red/blue ratio for different grow stages?