You can't use just Arduino alone to distribute power. You will still need 4 LED drivers. But, if you don't mind turning all lights on and off or dim them together, only one drive can drive the whole thing in series. You need the P type for arduino to control/dim with PWM, not the D type to be used with a potentiometer. I recommend you get all the LEDs, one driver, one arduino and a starter kit, try controlling/dimming one LED with arduino. If you find it doable, chain all LEDs, have some precaution not to blow up the small amperage LEDs, and move on to create your artificial day cycles. All are doable. Every once in a while one or more fish tank fellow comes along for similar projects here.