Thanks for all your help, one more question. It comes with 1x T5 39W 10000K lamp 1x T5 39W Actinic lamp. Do I need to changes those out or will that work for low to med light? I also temporarily have a 26 watt cfl sitting right over the water in a clip on light to try and keep my hornwart alive until I get the new light. Using the hornwort just for it's beneficial properties. Won't be scaping the tank until I get the light.