Hello everyone! very new to this forum, so bare with me. My tank is a hexagon tank that is 24" tall (roughly 21" after sand substrate) and 20" across. I have been looking and searching for a light that can reach the bottom of my tank to grow dwarf hairgrass. I also have anubias, java fern, and crypt with driftwood in my tank. I currently have a stock light that came with it, but it needs replaced badly. I have found a few T5 light fixtures that I am hoping one will be able to get my plants growing until I save up enough money. I am dosing the plants with excel and have a DIY CO2 system on it. The light fixtures I found were a Odyssea PS Dual 6500K and a Odyssea PS Quad 6500K. Just wondering which would be the best for my tank. Thank you!