I think I have some 3W "star" LEDs but not much. I think it will be just enough for 5G setup. It's OK, if it works I will make something bigger for my other tank.
So top of the 5G tank is 16.5"x8.3" and if I use two 1" U channels how many LEDs do I nee to install? Or how much is 200 PAR?
If I place LEDs 2" a part, I think it will be too bright (7 LEDs in each channel)