Hi everyone this is my first planted tank and have read and know what step need to get it done i'm getting stuck in lighting situation. I got a 29 gallons tank 30" in length, 12" in width, and 18 in high. My plan is to have carpet tank with dwarf hairgrass and few background and mid ground plants. I know depend on plant its needs mid to high light setting. What is best for 29 gallons tank? i search and see some people change their light to lower light and some to get more light. I don't want to over kill with the light and kill everything in the tank. I already have the subtrate and gravel laye out and just need to clarify with what type of light source to get.6700k up to or 6700k down? excuse my typing and thank in advance.